[1] Fdn IRCCS Policlin San Matteo, Div Infect Dis 1, I-27100 Pavia, Italy
[2] Fdn Policlin Univ Agostino Gemelli IRCCS, Internal Med & Gastroenterol, I-00168 Rome, Italy
[3] Univ Cattolica Sacro Cuore, Translat Med & Surg Dept, I-00168 Rome, Italy
[4] Univ Pavia, Dept Med Surg Diagnost & Pediat Sci, I-27100 Pavia, Italy