1. Department of Pharmacology and Toxicology, Geisel School of Medicine at Dartmouth, Hanover, NH 03755, USA.
2. Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC 27710, USA.
3. Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA.
4. Comprehensive Cancer Center, Department of Internal Medicine, and Department of Medicinal Chemistry, University of Michigan, Ann Arbor, MI 48109, USA.
5. Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA.
6. Institute for Genome Sciences and Policy, Duke University Medical Center, Durham, NC 27710, USA.
7. Department of Radiation Oncology, Duke University Medical Center, Durham, NC 27710, USA.
8. Department of Urology, College of Medicine, Chungbuk National University, Cheongju, Chungbuk 361-711, Korea.