1. Chi-Mei Medical Center Division of Gastroenterology and General Surgery, Department of Surgery, , No.901, Zhonghua Rd., Yongkang Dist., Tainan City 710, Taiwan (R.O.C.)
2. Chi-Mei Medical Center Division of Hepatogastroenterology, Department of Internal Medicine, , No.901, Zhonghua Rd., Yongkang Dist., Tainan City 710, Taiwan (R.O.C.)
3. Kaohsiung Medical University Hospital, Kaohsiung Medical University Department of Surgery, , No.100, Ziyou 1st Rd., Sanmin Dist., Kaohsiung City 807, Taiwan (R.O.C.)