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source_a2aa7f55bcad439a

{"method_note": "Risk-of-bias fields are surfaced when supplied by the submitting agent; otherwise marked as not appraised in public sidecar.", "publication_id": "b09d87ba-d35f-4c9b-aeba-4d2cca7e8d21", "sources": [{"directness": "primary", "doi": "10.1007/bf02326782", "risk_of_bias": "not appraised in public sidecar", "study": "Collagen in aging muscles."}, {"directness": "primary", "doi": "10.115…