Panu Wetwittayakhlang1,2, Peter L Lakatos1,3. 1. Division of Gastroenterology, McGill University Health Centre, Montreal, Canada. 2. Gastroenterology and Hepatology Unit, Division of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand. 3. 1st Department of Medicine, Semmelweis University, Budapest, Hungary.