1. Gene Therapy Program, Department of Pathology, Laboratory of Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104.
2. West China School of Pharmacy, Sichuan University, Chengdu 610041, People's Republic of China.
3. West China School of Clinical Medicine, Sichuan University, Chengdu 610041, People's Republic of China.
4. Department of Physiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104.
5. Gene Therapy Center, University of Massachusetts Medical School, Worcester, MA 01605.