Physical and cognitive functioning of people older than 90 years: a comparison of two Danish cohorts born 10 years apart - Christensen, K; Thinggaard, M; Oksuzyan, A; Steenstrup, T; Andersen-Ranberg, K; Bernard, B Jeune; McGue, M; Vaupel, JW (The Lancet, 2013)
doi.org/m67.