1. Faculty of Medicine University of Cyberjaya Cyberjaya Malaysia
2. Helicobacter Pylori and Microbiota Study Group Institute of Tropical Disease Universitas Airlangga Surabaya Indonesia
3. Division of Gastroentero‐Hepatology Department of Internal Medicine Faculty of Medicine Dr. Soetomo Teaching Hospital, Universitas Airlangga Surabaya Indonesia
4. Department of Pharmacology Faculty of Medicine Universiti Malaya Kuala Lumpur Malaysia