1. Department of Physiology, College of Medicine, Yeungnam University, Daegu 705-717, Korea.
2. Aging-associated Vascular Disease Research Center, College of Medicine, Yeungnam University, Daegu 705-717, Korea.
3. Department of Orthopedic Surgery, Gumi CHA University Hospital, Gumi 730-728, Korea.
4. School of Food Science & Biotechnology, Food & Bio-Industry Research Institute, Kyungpook National University, Daegu 702-701, Korea.