[1] ASL Prov Milano 1, Unita Org Alcoldipendenze, I-20013 Abbiategrasso, Italy
[2] Univ Milan, Dipartimento Med Interna, IRCCS Policlin S Donato, Milan, Italy
[3] Osped A Manzoni, Unita Operat Med, Lecce, Italy
[4] IRCCS Ist Clin Humanitas, Unita Operat Med Gen & Epatol, Rozzano, Italy
[5] Osped Varese, Unita Operat Gastroenterol, Varese, Italy
[6] Azienda Osped G Salvini, Unita Operat Gastroenterol, Rho, Italy
[7] Osped Valduce, Unita Operat Gastroenterol, Como, Italy