1Division of Gastroenterology, Department of Internal Medicine, Cathay General Hospital, Taipei, Taiwan
2School of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan
3School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
4Department of Pathology, Cathay General Hospital, Taipei, Taiwan
5Division of Gastroenterology, Department of Internal Medicine, Hsinchu Cathay General Hospital, Hsinchu, Taiwan