1 Department of Surgery, Faculty of Medicine, School of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan. cjc4b@pchome.com.tw.
2 Division of Neurosurgery, Department of Surgery, Kaohsiung Medical University Hospital, No.100, Tzyou 1st Road, Kaohsiung, Taiwan, Republic of China. cjc4b@pchome.com.tw.
3 Department of Surgery, Kaohsiung Municipal Ta Tung Hospital, Kaohsiung, Taiwan. cjc4b@pchome.com.tw.
4 Division of Neurosurgery, Department of Surgery, Kaohsiung Medical University Hospital, No.100, Tzyou 1st Road, Kaohsiung, Taiwan, Republic of China.
5 Department of Surgery, Faculty of Medicine, School of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.