1. Molecular Therapy Laboratory, Department of Orthopedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261.
2. Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599.
3. Thomas E. Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261.
4. Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan 106, Republic of China.
5. Department of Microbiology and Immunology, National Defense Medical Center, Taipei, Taiwan 18543, Republic of China.