Simadibrata D.M., Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom; Lesmana E., Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia; Pratama M.I.A., Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia; Sugiharta A.J., Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia; Winarizal A.S., Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia; Lee Y.Y., School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, Malaysia, GI Function and Motility Unit, Hospital USM, Kota Bharu, Malaysia; Syam A.F., Division of Gastroenterology, Department of Internal Medicine, Faculty of Medicine Universitas Indonesia—Ciptomangkunkusumo General Hospital, Jakarta, Indonesia