Kwang Ho Yoo1, Woo Seob Kim, Chang Kwun Hong, Beom Joon Kim. 1. Department of Dermatology, College of Medicine, Chung-Ang University, Seoul, Korea Department of Dermatology, College of Medicine, Catholic Kwandong University, International St. Mary's Hospital, Iecheon, Korea Department of Plastic and Reconstructive Surgery, College of Medicine, Chung-Ang University, Seoul, Korea Department of Dermatology, College of Medicine, Chung-Ang University, Seoul, Korea.