Abstract
Figures 1 and 2 in this article were published with the incorrect frailty index definitions for “frail” and “non-frail” subjects (in the key to the figures). Frail subjects were incorrectly defined as those with frailty index ≤0.21, and non-frail subjects with frailty index >0.21. The correct definitions of frail and non-frail subjects are those with frailty index >0.21 and ≤0.21, respectively, as presented in the amended figures below.
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