[1] Univ Spital Basel, Klin Dermatol & Venerol, Petersgraben 4, CH-4031 Basel, Switzerland
[2] Kinder & Jugendkrankenhaus Bult, Padiatr Dermatol & Allergol, Hannover, Germany
[3] Univ Spital Basel, Klin Med Onkol, Basel, Switzerland
[4] Bachmattenstr 11, CH-4102 Basel, Switzerland