Received April 11, 2011, Revised June 30, 2011, Accepted for publication June 30, 2011 Corresponding author: Joung Soo Kim, M.D., Ph.D., Department of Dermatology, Hanyang University Guri Hospital, 153 Gyeongchun-ro, Guri 471-701, Korea. Tel: 82-31-560-2285, Fax: 82-31-557-4872, E-mail: [email protected] This is an Open Access article distributed under the terms of the Creative Commons Att...