1. Department of Gastroenterology, Yangon General Hospital, University of Medicine (1), Yangon, Myanmar, Japan
2. Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan
3. Department of Medicine, Gastroenterology and Hepatology Section, Baylor College of Medicine, Houston, TX, USA
4. Gastroentero-Hepatology Division, Department of Internal Medicine, Dr. Soetomo Teaching Hospital-Faculty of Medicine-Institute of Tropical Disease, Universitas Airlangga, Surabaya, Indonesia
5. Gastroenterology Unit, Department of Medicine, Thammasat University Hospital, Pathumthani, Thailand
6. Department of Gastroenterology, Mandalay General Hospital, University of Medicine (Mandalay), Mandalay, Myanmar, Japan
7. Department of Gastroenterology, Thingangyun Sanpya General Hospital, University of Medicine (2), Thingangyun, Myanmar, Japan
8. Department of Molecular Pathology, Oita University Faculty of Medicine, Yufu, Japan
9. GI and Liver Center, Bangkok Medical Center, Bangkok, Thailand