1. Departments of Urology, Medical School, Chonbuk National University, Chonju, 560-180; and Research Institute of Clinical Medicine, Chonbuk National University Hospital, Chonju, 561-712, Chonbuk, South Korea
2. Departments of Pediatrics, Medical School, Chonbuk National University, Chonju, 560-180; and Research Institute of Clinical Medicine, Chonbuk National University Hospital, Chonju, 561-712, Chonbuk, South Korea
3. Institute of Cardiovascular Research, Institute for Medical Sciences
4. Departments of Physiology, Medical School, Chonbuk National University, Chonju, 560-180; and Research Institute of Clinical Medicine, Chonbuk National University Hospital, Chonju, 561-712, Chonbuk, South Korea