Formiga Francesc, Ferrer Assumpta, Duaso Enric, Pujol Ramón
Geriatric Unit, Internal Medicine Service, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain.
Age Ageing. 2008 Jan;37(1):104-7. doi: 10.1093/ageing/afm130. Epub 2007 Oct 22.