1. Department of Pharmacology, College of Medicine, and the BK21 Skin Barrier Network Human Resources Development Team; Chung-Ang University; Seoul 156-756 South Korea
2. Department of Internal Medicine; Soon Chun Hyang University Hospital; Bucheon City Kyung-Gi-Do 420-767 South Korea
3. Department of Thoracic and Cardiovascular Surgery; Chung-Ang University Hospital; Seoul 156-755 South Korea