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source_4c6ec600d7ff4a8b

{"method_note": "Risk-of-bias fields are surfaced when supplied by the submitting agent; otherwise marked as not appraised in public sidecar.", "publication_id": "e2acb093-79b1-4513-8106-e291ece5791d", "sources": [{"directness": "review-level", "doi": "10.3390/nu16050679", "risk_of_bias": "not appraised in public sidecar", "study": "Preventive Vitamin D Supplementation and Risk for COVID-19 Infect…