[1] Mahidol Univ, Fac Med, Siriraj Hosp, Dept Dermatol, Bangkok, Thailand
[2] Natl Cheng Kung Univ, Natl Cheng Kung Univ Hosp, Dept Dermatol, Tainan, Taiwan
[3] Kings Coll London, Guys Hosp, St Johns Inst Dermatol, London, England
[4] Natl Cheng Kung Univ, Coll Med, Inst Clin Med, Tainan, Taiwan