[1] Italian Natl Res Ctr Aging INRCA, IRCCS, Dept Geriatr & Emergency Care, Via Montagnola 81, I-60127 Ancona, Italy
[2] Ente Osped Cantonale, Dept Crit Care, Emergency Med Unit, Lugano, Switzerland
[3] UCL, Med Res Council MRC, Unit Lifelong Hlth & Ageing, London, England
[4] Univ Cattolica Sacro Cuore, Fdn Policlin Univ A Gemelli, IRCCS, Rome, Italy