1 Division of Hepato-Gastroenterology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, 123 Ta-Pei Road, Niao-Sung District, Kaohsiung City 833, Taiwan.
2 Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Medical University Hospital and Kaohsiung Medical University, Kaohsiung City 807, Taiwan.
3 Division of Gastroenterology, National Hospital Organization Tokyo Medical Center, 2-5-1 Higashigaoka, Meguro-ku, Tokyo 152-8902, Japan.
4 Department of Medicine, University of Malaysia, 50603 Kuala Lumpur, Malaysia.
5 Department of Internal Medicine, Division of Gastroenterology, University of Michigan, 1150 W Medical Center Drive, 6520A MSRB 1, SPC 5682, Ann Arbor, MI 48109-5682, USA.
6 Division of Gastroenterology, Zhongshan Hospital, Xiamen University, 201 Hubin South Road, Xiamen, Fujian 361004, China.