1. Division of Neurosurgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
2. College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
3. Chang Gung Memorial Hospital Kaohsiung Branch, Kaohsiung, Taiwan
4. Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan