The Lausanne cohort Lc65+: a population-based prospective study of the manifestations, determinants and outcomes of frailty oleh Rodondi Nicolas, Cornuz Jacques, Büla Christophe, Spagnoli Jacques, Seematter-Bagnoud Laurence, Karmaniola Athanassia, Santos-Eggimann Brigitte, Vollenweider Peter, Waeber Gérard, Pécoud Alain