Themistoklis G Vassiliadis1
, Anthia Gatopoulou2
, Kaliopi Patsiaoura1
, Olga Giouleme1
, Konstantinos Soufleris1
, Alexandros Boubonaris1
, Panagiotis Katsinelos3
and Nikolaos Eugenidis1 
1
2nd Propedeutic Clinic of Internal Medicine, Aristotle University of Thessaloniki, Greece
2
Endoscopy Unit, Demokritus University of Thrace, Alexandroupolis, Greece
3
Endoscopy and Motility Unit, Central Hospital, Thessaloniki, Greece