[1] Catholic Univ Korea, Coll Med, Dept Dermatol, Seoul St Marys Hosp, Seoul, South Korea
[2] Catholic Univ Korea, Uijeongbu St Marys Hosp, Seoul, South Korea
[3] Catholic Univ Korea, Incheon St Marys Hosp, Seoul, South Korea
[4] Catholic Univ Korea, Bucheon St Marys Hosp, Seoul, South Korea
[5] Catholic Univ Korea, St Vincent Hosp, Seoul, South Korea
[6] Catholic Univ Korea, Dept Stat, Seoul, South Korea
[7] Catholic Univ Korea, St Marys Hosp, Seoul, South Korea