1 Endoscopy Center For Diagnosis and Treatment, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Division of Gastroenterology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.
2 Division of General Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Surgery, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.
3 Endoscopy Center For Diagnosis and Treatment, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Division of Gastroenterology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; Institute of Brain Science, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan.