[1] Univ Med Ctr Freiburg, Dept Dermatol, Freiburg, Germany
[2] Kings Coll London, St Johns Inst Dermatol, London WC2R 2LS, England
[3] Univ Cologne, Dept Dermatol, Cologne, Germany
[4] Univ Bern, Dept Dermatol, Bern, Switzerland
[5] Univ Basel, Dept Dermatol, Basel, Switzerland
[6] Kings Coll London, Dept Med & Mol Genet, London WC2R 2LS, England
[7] St Thomas Hosp, GSTS Pathol, London, England
[8] Kawasaki Med Sch, Dept Dermatol, Okayama, Japan
[9] Univ Freiburg, Freiburg Inst Adv Studies, D-79106 Freiburg, Germany