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Jadczak AD, Robson L, Cooper T, Bell JS, Visvanathan R; FIRST Study Collaborators.Jadczak AD, et al.BMC Geriatr. 2021 Feb 3;21(1):99. doi: 10.1186/s12877-020-01974-1.BMC Geriatr. 2021.PMID: 33535968Free PMC article.