1. Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu 879-5593, Japan
2. Helicobacter pylori and Microbiota Study Group, Institute of Tropical Disease, Universitas Airlangga, Surabaya 60286, Indonesia
3. Division of Gastroentero-Hepatology, Department of Internal Medicine, Faculty of Medicine-Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya 60115, Indonesia
4. Department of Medical Biology, Faculty of Medicine, Universitas Airlangga, Surabaya 60132, Indonesia
5. Department of Pulmonology and Respiratory Medicine, Faculty of Medicine, Universitas Airlangga, Surabaya 60132, Indonesia
6. Department of Surgery, Faculty of Medicine, Universitas Airlangga, Surabaya 60132, Indonesia
7. Department of Endocrinology, Saiful Anwar General Hospital, Malang 65111, Indonesia
8. Division of Gastroenterology-Hepatology, Department of Internal Medicine, Faculty of Medicine, Hasanuddin University, Makassar 90245, Indonesia
9. Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA