[1] Kings Coll London, St Johns Inst Dermatol, London, England
[2] Natl Cheng Kung Univ, Natl Cheng Kung Univ Hosp, Dept Dermatol, Coll Med, Tainan, Taiwan
[3] Al Sabah Hosp, Asad Al Hamad Dermatol Ctr, Kuwait, Kuwait
[4] St Thomas Hosp, Viapath, London, England