1 Department of Obstetrics and Gynecology, Chiayi Chang Gung Memorial Hospital, Puzih City, Chiayi County, Taiwan.
2 Division of General Surgery, Department of Surgery, Chang Gung Memorial Hospital, Linkou Medical Center, Guishan, Taoyuan, Taiwan.
3 Division of General Surgery, Department of Surgery, Chang Gung Memorial Hospital, Linkou Medical Center, Guishan, Taoyuan, Taiwan; Department of General Surgery, Miaoli General Hospital, Ministry of Health and Welfare, Miaoli City, Miaoli County, Taiwan. Electronic address: b9602039@cgmh.org.tw.