[1] Klinikum Univ Koln, Klin & Poliklin Dermatol & Venerol, Kerpener Str 62, D-50937 Cologne, Germany
[2] Univ Klinikum Tubingen, Univ Hautklin, Tubingen, Germany
[3] Tech Univ Munich, Klin & Poliklin Dermatol & Allergol Biederstein, Munich, Germany
[4] Univ Klinikum Schleswig Holstein, Klin Dermatol Allergol & Venerol, Lubeck, Germany
[5] Inst Pathol, Ansbach, Germany
[6] Univ Klinikum Gottingen, Abt Dermatol & Venerol, Gottingen, Germany
[7] Charite, Klin Dermatol Venerol & Allergol, Berlin, Germany
[8] Univ Klinikum Erlangen, Med Klin 1, Abt Gastroenterol, Erlangen, Germany
[9] Klinikum Univ Koln, Klin & Poliklin Kinderheilkunde, Cologne, Germany
[10] Klinikum Univ Munchen, Klin & Poliklin Dermatol & Allergol, Munich, Germany
[11] Klinikum Univ Munchen, Inst Pathol, Munich, Germany