1 Geriatric Unit, Internal Medicine Department, Hospital Universitari de Bellvitge, Systemic Diseases and Ageing Group, Cardiovascular, Respiratory and Systemic Diseases and Cellular Aging Program, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Facultat de Medicina i Ciències de la Salut, Universitat de Barcelona. L'Hospitalet de Llobregat, Barcelona, Spain.
2 Center for Biostatistic and Applied Geriatric Clinical Epidemiology, Italian National Research Center on Ageing (IRCCS INRCA), Ancona and Cosenza, Italy. Electronic address: p.fabbietti@inrca.it.