Received January 28, 2014, Accepted for publication March 3, 2014 Corresponding author: Byung Cheol Park, Department of Dermatology, Dankook University Hospital, 201 Manghyang-ro, Dongnam-gu, Cheonan 330-715, Korea. Tel: 82-41-550-3926, Fax: 82-41-552-7541, E-mail: shinam73@hotmail.com This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial ...