1. Division of Hematology and Oncology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung 80756, Taiwan
2. Center for Cancer Research, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
3. Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
4. Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
5. Division of General and Digestive Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan
6. Department of Surgery, Faculty of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan