[1] Cardiff Univ, Univ Hosp Wales, Div Infect & Immun, Cardiff, Wales
[2] Univ Cambridge, Dept Pathol, Cambridge, England
[3] British Assoc Dermatol, London, England
[4] Blackheath Hosp, London, England
[5] Univ Hosp Bristol, Bristol Dermatol Ctr, Bristol, Avon, England