1. Department of Biochemistry, National Defense Medical Center, Taipei 114, Taiwan
2. Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 114, Taiwan
3. Division of Hematology and Oncology, Department of Internal Medicine, Tri-Service General Hospital Penghu Branch, Magong 880, Taiwan
4. Division of Urology, Department of Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan