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Gill TM, Pahor M, Guralnik JM, McDermott MM, King AC, Buford TW, Strotmeyer ES, Nelson ME, Sink KM, Demons JL, Kashaf SS, Walkup MP, Miller ME; LIFE Study Investigators.Gill TM, et al.BMJ. 2016 Feb 3;352:i245. doi: 10.1136/bmj.i245.BMJ. 2016.PMID: 26842425Free PMC article.Clinical Trial.