# Topics

**Canonical URL:** https://picoportal.org/library/topics/  
**Records in this collection:** 7,412

Showing 200 of 7,412.

- [Neuroscience and Neuropharmacology Research](https://picoportal.org/library/topics/neuroscience-and-neuropharmacology-research-2/)
- [Geological and Geochemical Analysis](https://picoportal.org/library/topics/geological-and-geochemical-analysis-2/)
- [Advanced Chemical Physics Studies](https://picoportal.org/library/topics/advanced-chemical-physics-studies-2/)
- [Genomics and Phylogenetic Studies](https://picoportal.org/library/topics/genomics-and-phylogenetic-studies-2/)
- [Advancements in Battery Materials](https://picoportal.org/library/topics/advancements-in-battery-materials-2/)
- [Geology and Paleoclimatology Research](https://picoportal.org/library/topics/geology-and-paleoclimatology-research-2/)
- [Advanced Photocatalysis Techniques](https://picoportal.org/library/topics/advanced-photocatalysis-techniques-2/)
- [Electrocatalysts for Energy Conversion](https://picoportal.org/library/topics/electrocatalysts-for-energy-conversion-2/)
- [Plant and animal studies](https://picoportal.org/library/topics/plant-and-animal-studies-2/)
- [RNA and protein synthesis mechanisms](https://picoportal.org/library/topics/rna-and-protein-synthesis-mechanisms-2/)
- [Climate variability and models](https://picoportal.org/library/topics/climate-variability-and-models-2/)
- [Child and Adolescent Psychosocial and Emotional Development](https://picoportal.org/library/topics/child-and-adolescent-psychosocial-and-emotional-development-2/)
- [Catalytic Processes in Materials Science](https://picoportal.org/library/topics/catalytic-processes-in-materials-science-2/)
- [Alzheimer's disease research and treatments](https://picoportal.org/library/topics/alzheimer-s-disease-research-and-treatments-2/)
- [Particle physics theoretical and experimental studies](https://picoportal.org/library/topics/particle-physics-theoretical-and-experimental-studies-2/)
- [Gut microbiota and health](https://picoportal.org/library/topics/gut-microbiota-and-health-2/)
- [Immune Cell Function and Interaction](https://picoportal.org/library/topics/immune-cell-function-and-interaction-2/)
- [Ecology and Vegetation Dynamics Studies](https://picoportal.org/library/topics/ecology-and-vegetation-dynamics-studies-2/)
- [Galaxies: Formation, Evolution, Phenomena](https://picoportal.org/library/topics/galaxies-formation-evolution-phenomena-2/)
- [Photosynthetic Processes and Mechanisms](https://picoportal.org/library/topics/photosynthetic-processes-and-mechanisms-2/)
- [Graphene research and applications](https://picoportal.org/library/topics/graphene-research-and-applications-2/)
- [Neural dynamics and brain function](https://picoportal.org/library/topics/neural-dynamics-and-brain-function-2/)
- [Neural Networks and Applications](https://picoportal.org/library/topics/neural-networks-and-applications-2/)
- [Protein Structure and Dynamics](https://picoportal.org/library/topics/protein-structure-and-dynamics-2/)
- [Advanced biosensing and bioanalysis techniques](https://picoportal.org/library/topics/advanced-biosensing-and-bioanalysis-techniques-2/)
- [Metal-Organic Frameworks: Synthesis and Applications](https://picoportal.org/library/topics/metal-organic-frameworks-synthesis-and-applications-2/)
- [DNA Repair Mechanisms](https://picoportal.org/library/topics/dna-repair-mechanisms-2/)
- [Mitochondrial Function and Pathology](https://picoportal.org/library/topics/mitochondrial-function-and-pathology-2/)
- [Black Holes and Theoretical Physics](https://picoportal.org/library/topics/black-holes-and-theoretical-physics/)
- [Atmospheric chemistry and aerosols](https://picoportal.org/library/topics/atmospheric-chemistry-and-aerosols-2/)
- [Monoclonal and Polyclonal Antibodies Research](https://picoportal.org/library/topics/monoclonal-and-polyclonal-antibodies-research-2/)
- [Soil Carbon and Nitrogen Dynamics](https://picoportal.org/library/topics/soil-carbon-and-nitrogen-dynamics-2/)
- [Corporate Finance and Governance](https://picoportal.org/library/topics/corporate-finance-and-governance-2/)
- [Physics of Superconductivity and Magnetism](https://picoportal.org/library/topics/physics-of-superconductivity-and-magnetism-2/)
- [Stellar, planetary, and galactic studies](https://picoportal.org/library/topics/stellar-planetary-and-galactic-studies-2/)
- [T-cell and B-cell Immunology](https://picoportal.org/library/topics/t-cell-and-b-cell-immunology-2/)
- [Epigenetics and DNA Methylation](https://picoportal.org/library/topics/epigenetics-and-dna-methylation-2/)
- [Perovskite Materials and Applications](https://picoportal.org/library/topics/perovskite-materials-and-applications-2/)
- [MicroRNA in disease regulation](https://picoportal.org/library/topics/microrna-in-disease-regulation-2/)
- [Neurotransmitter Receptor Influence on Behavior](https://picoportal.org/library/topics/neurotransmitter-receptor-influence-on-behavior-2/)
- [HIV Research and Treatment](https://picoportal.org/library/topics/hiv-research-and-treatment-2/)
- [Supercapacitor Materials and Fabrication](https://picoportal.org/library/topics/supercapacitor-materials-and-fabrication-2/)
- [Immunotherapy and Immune Responses](https://picoportal.org/library/topics/immunotherapy-and-immune-responses-2/)
- [Dementia and Cognitive Impairment Research](https://picoportal.org/library/topics/dementia-and-cognitive-impairment-research-2/)
- [Analytical Chemistry and Chromatography](https://picoportal.org/library/topics/analytical-chemistry-and-chromatography-2/)
- [Spectroscopy and Quantum Chemical Studies](https://picoportal.org/library/topics/spectroscopy-and-quantum-chemical-studies-2/)
- [Cell Adhesion Molecules Research](https://picoportal.org/library/topics/cell-adhesion-molecules-research-2/)
- [Nitric Oxide and Endothelin Effects](https://picoportal.org/library/topics/nitric-oxide-and-endothelin-effects-2/)
- [Marine and coastal ecosystems](https://picoportal.org/library/topics/marine-and-coastal-ecosystems-2/)
- [Glycosylation and Glycoproteins Research](https://picoportal.org/library/topics/glycosylation-and-glycoproteins-research-2/)
- [Parkinson's Disease Mechanisms and Treatments](https://picoportal.org/library/topics/parkinson-s-disease-mechanisms-and-treatments-2/)
- [Cosmology and Gravitation Theories](https://picoportal.org/library/topics/cosmology-and-gravitation-theories-2/)
- [Liver Disease Diagnosis and Treatment](https://picoportal.org/library/topics/liver-disease-diagnosis-and-treatment-2/)
- [Plant Molecular Biology Research](https://picoportal.org/library/topics/plant-molecular-biology-research-2/)
- [earthquake and tectonic studies](https://picoportal.org/library/topics/earthquake-and-tectonic-studies-2/)
- [Asthma and respiratory diseases](https://picoportal.org/library/topics/asthma-and-respiratory-diseases-2/)
- [Visual perception and processing mechanisms](https://picoportal.org/library/topics/visual-perception-and-processing-mechanisms/)
- [Ion channel regulation and function](https://picoportal.org/library/topics/ion-channel-regulation-and-function-2/)
- [Adsorption and biosorption for pollutant removal](https://picoportal.org/library/topics/adsorption-and-biosorption-for-pollutant-removal-2/)
- [Immune Response and Inflammation](https://picoportal.org/library/topics/immune-response-and-inflammation-2/)
- [Innovation and Knowledge Management](https://picoportal.org/library/topics/innovation-and-knowledge-management-2/)
- [Advanced Sensor and Energy Harvesting Materials](https://picoportal.org/library/topics/advanced-sensor-and-energy-harvesting-materials-2/)
- [Air Quality and Health Impacts](https://picoportal.org/library/topics/air-quality-and-health-impacts-2/)
- [Job Satisfaction and Organizational Behavior](https://picoportal.org/library/topics/job-satisfaction-and-organizational-behavior-2/)
- [RNA Research and Splicing](https://picoportal.org/library/topics/rna-research-and-splicing-2/)
- [Schizophrenia research and treatment](https://picoportal.org/library/topics/schizophrenia-research-and-treatment-2/)
- [Plant Stress Responses and Tolerance](https://picoportal.org/library/topics/plant-stress-responses-and-tolerance-2/)
- [Lipid Membrane Structure and Behavior](https://picoportal.org/library/topics/lipid-membrane-structure-and-behavior-2/)
- [Functional Brain Connectivity Studies](https://picoportal.org/library/topics/functional-brain-connectivity-studies-2/)
- [Bone Tissue Engineering Materials](https://picoportal.org/library/topics/bone-tissue-engineering-materials-2/)
- [Meta-analysis and systematic reviews](https://picoportal.org/library/topics/meta-analysis-and-systematic-reviews-2/)
- [DNA and Nucleic Acid Chemistry](https://picoportal.org/library/topics/dna-and-nucleic-acid-chemistry-2/)
- [Stress Responses and Cortisol](https://picoportal.org/library/topics/stress-responses-and-cortisol-2/)
- [Fish Ecology and Management Studies](https://picoportal.org/library/topics/fish-ecology-and-management-studies-2/)
- [Plant Water Relations and Carbon Dynamics](https://picoportal.org/library/topics/plant-water-relations-and-carbon-dynamics-2/)
- [Advanced Neural Network Applications](https://picoportal.org/library/topics/advanced-neural-network-applications-2/)
- [Nanoparticles: synthesis and applications](https://picoportal.org/library/topics/nanoparticles-synthesis-and-applications-2/)
- [Electrochemical Analysis and Applications](https://picoportal.org/library/topics/electrochemical-analysis-and-applications-2/)
- [Advanced Statistical Methods and Models](https://picoportal.org/library/topics/advanced-statistical-methods-and-models-2/)
- [Genomics and Chromatin Dynamics](https://picoportal.org/library/topics/genomics-and-chromatin-dynamics-2/)
- [Pancreatic function and diabetes](https://picoportal.org/library/topics/pancreatic-function-and-diabetes-2/)
- [Financial Markets and Investment Strategies](https://picoportal.org/library/topics/financial-markets-and-investment-strategies-2/)
- [Computational Drug Discovery Methods](https://picoportal.org/library/topics/computational-drug-discovery-methods-2/)
- [Bacteriophages and microbial interactions](https://picoportal.org/library/topics/bacteriophages-and-microbial-interactions-2/)
- [Obesity, Physical Activity, Diet](https://picoportal.org/library/topics/obesity-physical-activity-diet-2/)
- [SARS-CoV-2 and COVID-19 Research](https://picoportal.org/library/topics/sars-cov-2-and-covid-19-research-2/)
- [Neuropeptides and Animal Physiology](https://picoportal.org/library/topics/neuropeptides-and-animal-physiology-2/)
- [Autism Spectrum Disorder Research](https://picoportal.org/library/topics/autism-spectrum-disorder-research-2/)
- [Customer Service Quality and Loyalty](https://picoportal.org/library/topics/customer-service-quality-and-loyalty-2/)
- [Natural Language Processing Techniques](https://picoportal.org/library/topics/natural-language-processing-techniques-2/)
- [Memory and Neural Mechanisms](https://picoportal.org/library/topics/memory-and-neural-mechanisms-2/)
- [Pain Mechanisms and Treatments](https://picoportal.org/library/topics/pain-mechanisms-and-treatments-2/)
- [Antibiotic Resistance in Bacteria](https://picoportal.org/library/topics/antibiotic-resistance-in-bacteria-2/)
- [RNA Interference and Gene Delivery](https://picoportal.org/library/topics/rna-interference-and-gene-delivery-2/)
- [Fluid Dynamics and Turbulent Flows](https://picoportal.org/library/topics/fluid-dynamics-and-turbulent-flows-2/)
- [Cancer-related Molecular Pathways](https://picoportal.org/library/topics/cancer-related-molecular-pathways-2/)
- [Microplastics and Plastic Pollution](https://picoportal.org/library/topics/microplastics-and-plastic-pollution-2/)
- [CRISPR and Genetic Engineering](https://picoportal.org/library/topics/crispr-and-genetic-engineering-2/)
- [Mosquito-borne diseases and control](https://picoportal.org/library/topics/mosquito-borne-diseases-and-control-2/)
- [Virus-based gene therapy research](https://picoportal.org/library/topics/virus-based-gene-therapy-research/)
- [Solar and Space Plasma Dynamics](https://picoportal.org/library/topics/solar-and-space-plasma-dynamics-2/)
- [Cancer, Hypoxia, and Metabolism](https://picoportal.org/library/topics/cancer-hypoxia-and-metabolism-2/)
- [Wildlife Ecology and Conservation](https://picoportal.org/library/topics/wildlife-ecology-and-conservation/)
- [Organic Electronics and Photovoltaics](https://picoportal.org/library/topics/organic-electronics-and-photovoltaics-2/)
- [Monetary Policy and Economic Impact](https://picoportal.org/library/topics/monetary-policy-and-economic-impact-2/)
- [Carbon Nanotubes in Composites](https://picoportal.org/library/topics/carbon-nanotubes-in-composites-2/)
- [Neural and Behavioral Psychology Studies](https://picoportal.org/library/topics/neural-and-behavioral-psychology-studies-2/)
- [Health disparities and outcomes](https://picoportal.org/library/topics/health-disparities-and-outcomes-2/)
- [Neurobiology and Insect Physiology Research](https://picoportal.org/library/topics/neurobiology-and-insect-physiology-research-2/)
- [Mass Spectrometry Techniques and Applications](https://picoportal.org/library/topics/mass-spectrometry-techniques-and-applications-2/)
- [Receptor Mechanisms and Signaling](https://picoportal.org/library/topics/receptor-mechanisms-and-signaling-2/)
- [Microbial Community Ecology and Physiology](https://picoportal.org/library/topics/microbial-community-ecology-and-physiology-2/)
- [Nanoparticle-Based Drug Delivery](https://picoportal.org/library/topics/nanoparticle-based-drug-delivery-2/)
- [Astro and Planetary Science](https://picoportal.org/library/topics/astro-and-planetary-science-2/)
- [Cancer Immunotherapy and Biomarkers](https://picoportal.org/library/topics/cancer-immunotherapy-and-biomarkers-2/)
- [Heavy metals in environment](https://picoportal.org/library/topics/heavy-metals-in-environment-2/)
- [Diabetes, Cardiovascular Risks, and Lipoproteins](https://picoportal.org/library/topics/diabetes-cardiovascular-risks-and-lipoproteins-2/)
- [Phytochemicals and Antioxidant Activities](https://picoportal.org/library/topics/phytochemicals-and-antioxidant-activities-2/)
- [Cardiac electrophysiology and arrhythmias](https://picoportal.org/library/topics/cardiac-electrophysiology-and-arrhythmias-2/)
- [Cellular transport and secretion](https://picoportal.org/library/topics/cellular-transport-and-secretion-2/)
- [Cell death mechanisms and regulation](https://picoportal.org/library/topics/cell-death-mechanisms-and-regulation-2/)
- [Drug Transport and Resistance Mechanisms](https://picoportal.org/library/topics/drug-transport-and-resistance-mechanisms-2/)
- [Biofuel production and bioconversion](https://picoportal.org/library/topics/biofuel-production-and-bioconversion-2/)
- [Neuroinflammation and Neurodegeneration Mechanisms](https://picoportal.org/library/topics/neuroinflammation-and-neurodegeneration-mechanisms-2/)
- [Osteoarthritis Treatment and Mechanisms](https://picoportal.org/library/topics/osteoarthritis-treatment-and-mechanisms-2/)
- [Microtubule and mitosis dynamics](https://picoportal.org/library/topics/microtubule-and-mitosis-dynamics-2/)
- [Nuclear physics research studies](https://picoportal.org/library/topics/nuclear-physics-research-studies-2/)
- [Adipose Tissue and Metabolism](https://picoportal.org/library/topics/adipose-tissue-and-metabolism-2/)
- [Plant-Microbe Interactions and Immunity](https://picoportal.org/library/topics/plant-microbe-interactions-and-immunity-2/)
- [Bacterial Genetics and Biotechnology](https://picoportal.org/library/topics/bacterial-genetics-and-biotechnology-2/)
- [Estrogen and related hormone effects](https://picoportal.org/library/topics/estrogen-and-related-hormone-effects-2/)
- [High-pressure geophysics and materials](https://picoportal.org/library/topics/high-pressure-geophysics-and-materials-2/)
- [Malaria Research and Control](https://picoportal.org/library/topics/malaria-research-and-control-2/)
- [Social and Intergroup Psychology](https://picoportal.org/library/topics/social-and-intergroup-psychology-2/)
- [Diet and metabolism studies](https://picoportal.org/library/topics/diet-and-metabolism-studies-2/)
- [Concrete and Cement Materials Research](https://picoportal.org/library/topics/concrete-and-cement-materials-research-2/)
- [Circadian rhythm and melatonin](https://picoportal.org/library/topics/circadian-rhythm-and-melatonin-2/)
- [Tuberculosis Research and Epidemiology](https://picoportal.org/library/topics/tuberculosis-research-and-epidemiology/)
- [Semiconductor materials and devices](https://picoportal.org/library/topics/semiconductor-materials-and-devices-2/)
- [Angiogenesis and VEGF in Cancer](https://picoportal.org/library/topics/angiogenesis-and-vegf-in-cancer-2/)
- [Probiotics and Fermented Foods](https://picoportal.org/library/topics/probiotics-and-fermented-foods-2/)
- [Musculoskeletal pain and rehabilitation](https://picoportal.org/library/topics/musculoskeletal-pain-and-rehabilitation-2/)
- [Magnetic confinement fusion research](https://picoportal.org/library/topics/magnetic-confinement-fusion-research-2/)
- [Quantum Information and Cryptography](https://picoportal.org/library/topics/quantum-information-and-cryptography-2/)
- [Genetic diversity and population structure](https://picoportal.org/library/topics/genetic-diversity-and-population-structure-2/)
- [Ionosphere and magnetosphere dynamics](https://picoportal.org/library/topics/ionosphere-and-magnetosphere-dynamics-2/)
- [Theoretical and Computational Physics](https://picoportal.org/library/topics/theoretical-and-computational-physics/)
- [Meat and Animal Product Quality](https://picoportal.org/library/topics/meat-and-animal-product-quality-2/)
- [Complex Network Analysis Techniques](https://picoportal.org/library/topics/complex-network-analysis-techniques-2/)
- [Cellular Mechanics and Interactions](https://picoportal.org/library/topics/cellular-mechanics-and-interactions-2/)
- [Eating Disorders and Behaviors](https://picoportal.org/library/topics/eating-disorders-and-behaviors-2/)
- [Cancer Cells and Metastasis](https://picoportal.org/library/topics/cancer-cells-and-metastasis-2/)
- [Gold and Silver Nanoparticles Synthesis and Applications](https://picoportal.org/library/topics/gold-and-silver-nanoparticles-synthesis-and-applications-2/)
- [Autophagy in Disease and Therapy](https://picoportal.org/library/topics/autophagy-in-disease-and-therapy-2/)
- [Conducting polymers and applications](https://picoportal.org/library/topics/conducting-polymers-and-applications-2/)
- [Astrophysics and Star Formation Studies](https://picoportal.org/library/topics/astrophysics-and-star-formation-studies-2/)
- [Genetic Associations and Epidemiology](https://picoportal.org/library/topics/genetic-associations-and-epidemiology-2/)
- [Membrane Separation Technologies](https://picoportal.org/library/topics/membrane-separation-technologies-2/)
- [biodegradable polymer synthesis and properties](https://picoportal.org/library/topics/biodegradable-polymer-synthesis-and-properties-2/)
- [TiO2 Photocatalysis and Solar Cells](https://picoportal.org/library/topics/tio2-photocatalysis-and-solar-cells/)
- [Species Distribution and Climate Change](https://picoportal.org/library/topics/species-distribution-and-climate-change-2/)
- [Influenza Virus Research Studies](https://picoportal.org/library/topics/influenza-virus-research-studies-2/)
- [Economic theories and models](https://picoportal.org/library/topics/economic-theories-and-models-2/)
- [Epilepsy research and treatment](https://picoportal.org/library/topics/epilepsy-research-and-treatment-2/)
- [Sperm and Testicular Function](https://picoportal.org/library/topics/sperm-and-testicular-function-2/)
- [ZnO doping and properties](https://picoportal.org/library/topics/zno-doping-and-properties/)
- [Glioma Diagnosis and Treatment](https://picoportal.org/library/topics/glioma-diagnosis-and-treatment-2/)
- [Algal biology and biofuel production](https://picoportal.org/library/topics/algal-biology-and-biofuel-production-2/)
- [Hydrology and Watershed Management Studies](https://picoportal.org/library/topics/hydrology-and-watershed-management-studies-2/)
- [EEG and Brain-Computer Interfaces](https://picoportal.org/library/topics/eeg-and-brain-computer-interfaces-2/)
- [Toxic Organic Pollutants Impact](https://picoportal.org/library/topics/toxic-organic-pollutants-impact/)
- [Entrepreneurship Studies and Influences](https://picoportal.org/library/topics/entrepreneurship-studies-and-influences-2/)
- [Topic Modeling](https://picoportal.org/library/topics/topic-modeling/)
- [Quantum Dots Synthesis And Properties](https://picoportal.org/library/topics/quantum-dots-synthesis-and-properties-2/)
- [Reproductive Biology and Fertility](https://picoportal.org/library/topics/reproductive-biology-and-fertility-2/)
- [Electrochemical sensors and biosensors](https://picoportal.org/library/topics/electrochemical-sensors-and-biosensors-2/)
- [Technology Adoption and User Behaviour](https://picoportal.org/library/topics/technology-adoption-and-user-behaviour/)
- [2D Materials and Applications](https://picoportal.org/library/topics/2d-materials-and-applications-2/)
- [Plant tissue culture and regeneration](https://picoportal.org/library/topics/plant-tissue-culture-and-regeneration-2/)
- [Extracellular vesicles in disease](https://picoportal.org/library/topics/extracellular-vesicles-in-disease-2/)
- [Pharmaceutical and Antibiotic Environmental Impacts](https://picoportal.org/library/topics/pharmaceutical-and-antibiotic-environmental-impacts-2/)
- [Hepatocellular Carcinoma Treatment and Prognosis](https://picoportal.org/library/topics/hepatocellular-carcinoma-treatment-and-prognosis-2/)
- [Marine and fisheries research](https://picoportal.org/library/topics/marine-and-fisheries-research-2/)
- [Land Use and Ecosystem Services](https://picoportal.org/library/topics/land-use-and-ecosystem-services-2/)
- [Reading and Literacy Development](https://picoportal.org/library/topics/reading-and-literacy-development-2/)
- [Food composition and properties](https://picoportal.org/library/topics/food-composition-and-properties-2/)
- [Quantum and electron transport phenomena](https://picoportal.org/library/topics/quantum-and-electron-transport-phenomena-2/)
- [Smoking Behavior and Cessation](https://picoportal.org/library/topics/smoking-behavior-and-cessation-2/)
- [Antifungal resistance and susceptibility](https://picoportal.org/library/topics/antifungal-resistance-and-susceptibility-2/)
- [Atrial Fibrillation Management and Outcomes](https://picoportal.org/library/topics/atrial-fibrillation-management-and-outcomes-2/)
- [Advanced Battery Materials and Technologies](https://picoportal.org/library/topics/advanced-battery-materials-and-technologies-2/)
- [Advanced MRI Techniques and Applications](https://picoportal.org/library/topics/advanced-mri-techniques-and-applications-2/)
- [Parallel Computing and Optimization Techniques](https://picoportal.org/library/topics/parallel-computing-and-optimization-techniques-2/)
- [Chronic Obstructive Pulmonary Disease (COPD) Research](https://picoportal.org/library/topics/chronic-obstructive-pulmonary-disease-copd-research-2/)
- [Bone health and osteoporosis research](https://picoportal.org/library/topics/bone-health-and-osteoporosis-research-2/)
- [Oral microbiology and periodontitis research](https://picoportal.org/library/topics/oral-microbiology-and-periodontitis-research-2/)
- [Cold Atom Physics and Bose-Einstein Condensates](https://picoportal.org/library/topics/cold-atom-physics-and-bose-einstein-condensates-2/)
- [Chemical Synthesis and Analysis](https://picoportal.org/library/topics/chemical-synthesis-and-analysis-2/)
- [Thermochemical Biomass Conversion Processes](https://picoportal.org/library/topics/thermochemical-biomass-conversion-processes/)
- [Inflammatory Bowel Disease](https://picoportal.org/library/topics/inflammatory-bowel-disease-2/)

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Source: PICO Portal — public research metadata, principally OpenAlex.
