1. Department of Dermatology; National Medical Center; Seoul Korea
2. Department of Dermatology; St Paul's Hospital; College of Medicine; The Catholic University of Korea; Seoul Korea
3. Department of Dermatology; College of Medicine; Chosun University; Gwangju Korea
4. Department of Dermatology; Dongtan Sacred Heart Hospital; College of Medicine; Hallym University; Hwaseong Korea
5. Department of Dermatology; College of Medicine; Kyunghee University; Seoul Korea
6. Department of Dermatology; Uijeongbu St Mary's Hospital; College of Medicine; The Catholic University of Korea; Uijeongbu Korea
7. Department of Dermatology; Sanggye Paik Hospital; College of Medicine; Inje University; Seoul Korea
8. Department of Dermatology; College of Medicine; Kyungpook National University; Daegu Korea
9. Department of Dermatology; College of Medicine; Eulji University; Seoul Korea