[1] Kings Coll London, Genet Skin Dis Grp, St Johns Inst Dermatol, London WC2R 2LS, England
[2] St Thomas Hosp, Robin Eady Natl Diagnost Epidermolysis, Bullosa Lab, GSTS Pathol, London, England
[3] Guys & St Thomas NHS Fdn Trust, St Johns Inst Dermatol, London, England