[1] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Dept Healthcare Profess, Via Francesco Sforza 35, I-20122 Milan, Italy
[2] Univ Torino, Dept Publ Hlth & Paediat, Via Santena 5, I-10126 Turin, Italy
[3] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Gen Internal Med Unit, Dept Healthcare Profess, Via Francesco Sforza 35, I-20122 Milan, Italy
[4] Fdn IRCCS Ca Granda Osped Maggiore Policlin, High Dependency Unit, Dept Healthcare Profess, Via Francesco Sforza 35, I-20122 Milan, Italy