1. Department of Physiology, College of Medicine, Pusan National University, Pusan 602-739, Korea.
2. Department of Plastic Surgery, College of Medicine, Pusan National University, Pusan 602-739, Korea.
3. Medical Research Institute, Pusan National University, Pusan 602-739, Korea.
4. Medical Research Center for Ischemic Tissue Engineering, Pusan National University, Pusan 602-739, Republic of Korea.