1. Department of Medicine; School of Medicine; National Yang-Ming University; Taipei Taiwan
2. Division of Gastroenterology; Department of Medicine; Taipei Veterans General Hospital; Taipei Taiwan
3. Department of Medicine; Taipei City Hospital Heping Fuyou Branch; Taipei Taiwan
4. Division of Endocrinology and Metabolism; Department of Medicine; Taipei Veterans General Hospital; Taipei Taiwan
5. Division of Allergy, Immunology and Rheumatology; Department of Medicine; Taipei Veterans General Hospital; Taipei Taiwan
6. Department of Medicine; Endoscopic Center for Diagnosis and Therapy; Taipei Veterans General Hospital; Taipei Taiwan