[1] Univ Manchester, Med Sch, Manchester, England
[2] Jaber Al Ahmed Hosp, Dept Dermatol, Kuwait, Kuwait
[3] Aalborg Univ Hosp, Dept Dermatol, Aalborg, Denmark
[4] Mid Cheshire NHS Fdn Trust, Macclesfield, England
[5] Guys & St Thomas NHS Fdn Trust, Guys Hosp Canc Ctr, St Johns Inst Dermatol, Dermatol Surg & Laser Unit, Great Maze Pond, London, England
[6] Univ Manchester, Fac Med & Human Sci, Stopford Bldg,Oxford Rd, Manchester M13 9PL, England