Adriana D.N., Department of Internal Medicine, Faculty of Medicine, Soetomo Teaching Hospital, Universitas Airlangga, Dr, Surabaya, 60286, Indonesia; Sugihartono T., Gastroenterology and Hepatology Division, Department of Internal Medicine, Faculty of Medicine, Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, 60286, Indonesia; Nusi I.A., Gastroenterology and Hepatology Division, Department of Internal Medicine, Faculty of Medicine, Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, 60286, Indonesia; Setiawan P.B., Gastroenterology and Hepatology Division, Department of Internal Medicine, Faculty of Medicine, Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, 60286, Indonesia; Purbayu H., Gastroenterology and Hepatology Division, Department of Internal Medicine, Faculty of Medicine, Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, 60286, Indonesia; Maimunah U., Gastroenterology and Hepatology Division, Department of Internal Medicine, Faculty of Medicine, Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, 60286, Indonesia; Kholili U., Gastroenterology and Hepatology Division, Department of Internal Medicine, Faculty of Medicine, Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, 60286, Indonesia; Widodo B., Gastroenterology and Hepatology Division, Department of Internal Medicine, Faculty of Medicine, Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, 60286, Indonesia; Thamrin H., Gastroenterology and Hepatology Division, Department of Internal Medicine, Faculty of Medicine, Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, 60286, Indonesia; Vidyani A., Gastroenterology and Hepatology Division, Department of Internal Medicine, Faculty of Medicine, Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, 60286, Indonesia; Maulahela H., Division of Gastroenterology, Department of Internal Medicine, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia; Yamaoka Y., Gastroenterology and Hepatology Division, Department of Internal Medicine, Faculty of Medicine, Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, 60286, Indonesia, Helicobacter Pylori and Microbiota Study Group, Institute of Tropical Disease, Universitas Airlangga, Surabaya, 60115, Indonesia, Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Oita, Yufu, 879-5593, Japan, Department of Medicine, Gastroenterology and Hepatology Section, Baylor College of Medicine, Houston, TX, United States; Miftahussurur M., Gastroenterology and Hepatology Division, Department of Internal Medicine, Faculty of Medicine, Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, 60286, Indonesia, Helicobacter Pylori and Microbiota Study Group, Institute of Tropical Disease, Universitas Airlangga, Surabaya, 60115, Indonesia