Affiliation: | Matteo Piciucchi, Elettra Merola, Massimo Marignani, Marianna Signoretti, Roberto Valente, Lucia Cocomello, Flavia Baccini, Francesco Panzuto, Gabriele Capurso, Gianfranco Delle Fave, Digestive and Liver Disease Unit, II Medical School, University “Sapienza”, 00189 Rome, Italy |