1. Department of Surgery; School of Medicine, University of Pittsburgh; Pittsburgh 15213 Pennsylvania
2. Division of Oncology/Hematology, Department of Internal Medicine; Korea University College of Medicine; Seoul Republic of Korea
3. Center for Pharmacogenetics and Department of Pharmaceutical Sciences; School of Pharmacy, University of Pittsburgh; Pittsburgh 15261 Pennsylvania
4. Protein Metabolism Medical Research Center and Department of Biomedical Science; College of Medicine, Seoul National University; Seoul 110-799 Korea
5. Department of Pharmacology and Chemical Biology; School of Medicine, University of Pittsburgh; Pittsburgh 15213 Pennsylvania