[1] Royal Victoria Infirm, Dept Dermatol, Newcastle Upon Tyne, England
[2] Royal Victoria Infirm, Dept Histopathol, Newcastle Upon Tyne, England
[3] Univ Hosp Birmingham, Dept Pathol, Birmingham, England
[4] Norfolk & Norwich Univ Hosp, Dept Dermatol, Norwich, England
[5] Univ East Anglia, Norwich Med Sch, Norwich, England
[6] Natl Dis Registrat Serv & NHS Digital, Leeds, England
[7] Queen Mary Univ London, Blizard Inst, Ctr Cell Biol & Cutaneous Res, London, England
[8] Royal London Hosp, Barts Hlth NHS Trust, Dept Dermatol, London, England
[9] Royal London Hosp, Barts Hlth NHS Trust, Dept Pathol, London, England
[10] Newcastle Univ, Translat & Clin Res Inst, Newcastle Upon Tyne, England
[11] Newcastle Univ, Translat & Clin Res Inst, Newcastle NE1 3BZ, England