1. Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
2. Digestive Health Research Institute, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
3. Department of Surgery, Otemae Hospital, Osaka, Japan
4. Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
5. GI-Unit, 3rd Academic Department of Internal Medicine, National and Kapodistrian University of Athens, Sotiria Hospital, Athens, Greece