Sarcopenia: European consensus on definition and diagnosis - Cruz-Jentoft, A J; Baeyens, J P; Bauer, J M; Boirie, Y; Cederholm, T; Landi, F; Martin, F C; Michel, J P; Rolland, Y; Schneider, S M; Topinková, E; Vandewoude, M; Zamboni, M (Age Ageing, 2010)