[1] Univ Cattolica Sacro Cuore, I-00168 Rome, Italy
[2] Univ Naples Federico II, Naples, Italy
[3] San Giovanni Battista Hosp, Turin, Italy
[4] D Cotugno Hosp, Infect Dis & Intervent Ultrasound Unit 9, Naples, Italy
[5] Guglielmo da Saliceto Hosp, Piacenza, Italy
[6] St Orsola Marcello Malpighi Hosp, Liver & Multiorgan Transplant Unit, Dept Gen Surg, Bologna, Italy
[7] Belcolle Hosp, Viterbo, Italy