Social Frailty Index: Development and validation of an index of social attributes predictive of mortality in older adults. Proc Natl Acad Sci U S A. 2023 Feb 14; 120(7):e2209414120. Shah SJ, Oreper S, Jeon SY, Boscardin WJ, Fang MC, Covinsky KE. PMID: 36749720.
Link to paper: https://doi.org/10.1073/pnas.2209414120
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