Received March 11, 2011, Revised August 29, 2011, Accepted for publication August 30, 2011 Corresponding author: Chi Yeon Kim, M.D., Ph.D., Department of Dermatology, Gyeongsang National University Hospital, 79 Gangnam-ro, Jinju 660-702, Korea. Tel: 82-55-750-8184, Fax: 82-55-7588106, E-mail: [email protected] This is an Open Access article distributed under the terms of the Creative Commons...