1. Medical Research Center for Ischemic Tissue Regeneration, School of Medicine, Pusan National University, Yangsan 626-870, Korea.
2. Department of Dermatology, School of Medicine, Pusan National University, Yangsan 626-870, Korea.
3. Department of Physiology, School of Medicine, Pusan National University, Yangsan 626-870, Korea.
4. Research Institute of Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan 626-770, Korea.