^aDepartment of Gastroenterology and Hepatology, Molinette Hospital

^bInstitute for Biostructures and Bioimages (CNR) c/o Molecular Biotechnology Center, University of Turin, Turin, Italy

Correspondence to Rinaldo Pellicano, MD, Department of Gastroenterology and Hepatology, Molinette Hospital, Via Cavour 31, Torino 10126, Italy Tel: +39 11 6333565; fax: +39 11 6336249; e-mail: [email protected]

Received October 21, 2014

Accepted October 24, 2014