1Department of Surgery, Medical College, National Cheng Kung University, Tainan, Taiwan.
2Po-Chang Lee, M.D., Department of Surgery, National Cheng Kung University Hospital, 138 Sheng-Li Road, Tainan, Taiwan 704. E-mail
3Department of Pathology, University of California, Los Angeles, CA
4Department of Surgery, Medical College, National Taiwan University, Taipei, Taiwan.
5Department of Pathology, Medical College, National Cheng Kung University, Tainan, Taiwan
6Department of Immunology, Medical College, National Cheng Kung University, Tainan, Taiwan.