title: Response to Marsden and Ford.
authors: Faculty of Medicine, Division of Gastroenterology, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
authors: Somchai
authors: S
authors: Leelakusolvong
authors: Faculty of Medicine, Division of Gastroenterology, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
authors: Julajak
authors: J
authors: Limsrivilai
authors: Faculty of Medicine, Division of Gastroenterology, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
authors: Phunchai
authors: P
authors: Charatcharoenwitthaya
authors: Faculty of Medicine, Division of Gastroenterology, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
authors: Nonthalee
authors: N
authors: Pausawasdi