[1] Queen Mary Univ London, Barts & London Sch Med & Dent, Ctr Cutaneous Res, London E1 2AT, England
[2] Queen Mary Univ London, Barts & London Sch Med & Dent, Skin Tumour Lab, Canc Res UK, London E1 2AT, England
[3] Queen Mary Univ London, Barts & London Sch Med & Dent, Skin Virus Lab, London E1 2AT, England
[4] Univ Cambridge, Dept Pathol, Cambridge CB2 1QP, England