1. Institute of Medicine, College of Medicine, Chung Shan Medical University, Taichung 402, Taiwan, R.O.C.
2. Department of Pharmacology, Tung's Taichung MetroHarbor Hospital, Taichung 435, Taiwan, R.O.C.
3. School of Medicine, College of Medicine, Chung Shan Medical University, Taichung 402, Taiwan, R.O.C.
4. Department of Surgery, Division of General Surgery, China Medical University Hospital, Taichung 402, Taiwan, R.O.C.
5. Department of Surgery, Division of General Surgery, Taipei Medical University Hospital, Taipei Medical University, Taipei 115, Taiwan, R.O.C.
6. Department of Pathology, Changhua Christian Hospital, Changhua 500, Taiwan, R.O.C.
7. Cancer Center, Taipei Medical University Hospital, Taipei Medical University, Taipei 115, Taiwan, R.O.C.