{"abbreviations":{},"aggregated_contexts":{},"claims":[],"contexts":[],"equations":[],"facts":[],"findings":[],"headline":null,"key_statements":[],"keyword_relevance":{},"keywords":[],"metadata":{"identifiers":{"url":"https://www.ncbi.nlm.nih.gov/pmc/articles/4703447/pdf"},"language":"en","title":"Preparing to download ..."},"participants":[],"populations":[],"prevalence":[],"processes":[],"reference_links":[],"sections":{"future_work":[],"limitations":[]},"species":[],"statistics":[],"structured_content":[],"structured_summary":{},"study_features":{"snapshot_conclusions":[],"snapshot_methods":[],"snapshot_results":[]},"summary":[],"unstructured_content":null}