Corresponding Author

2nd Department of Internal Medicine, National and Kapodistrian University of Athens School of Health Sciences, General Hospital of Athens “Hippokratio”, Athens, Greece

Corresponding authors

George V. Papatheodoridis, MD, PhD, Director of Department of Gastroenterology, School of Medicine, National and Kapodistrian University of Athens, General Hospital of Athens “Laiko”, 17 Agiou Thoma street, 11527 Athens, Greece.

Email: gepapath@med.uoa.gr

Stephanos Hadziyannis, Professor Emeritus, 2nd Department of Internal Medicine, School of Medicine, National and Kapodistrian University of Athens, General Hospital of Athens “Hippokratio”, 63-6 7Evrou, 115 27 Athens, Greece

Email: hadziyannis@ath.forthnet.gr

Jia-Horng Kao, Chair Professor, Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, 1 Chang-Te St., Taipei 10002, Taiwan

Email: kaojh@ntu.edu.tw