[1] Univ Klinikum Munster, KCP, D-48149 Munster, Germany
[2] Univ Klinikum Munster, Klin Hautkrankheiten, D-48149 Munster, Germany
[3] Tech Univ Munich, Zentrum Allergie & Umwelt, Klin & Poliklin Dermatol & Allergol Biederstein, D-8000 Munich, Germany
[4] Deutsch Klin Diagnost, D-6200 Wiesbaden, Germany
[5] Univ Giessen Klinikum, Zentrum Psychosomat Med, Giessen, Germany
[6] Univ Med Berlin, Dermatol Klin, Charite, Berlin, Germany
[7] Univ Amsterdam, Dept Gastroenterol & Hepatol, Acad Med Ctr, NL-1012 WX Amsterdam, Netherlands
[8] Univ Klinikum Magdeburg, Klin Dermatol & Venerol, Magdeburg, Germany
[9] Univ Klinikum Heidelberg, Klin Sozialmed Berufs & Umweltdermatol, Heidelberg, Germany
[10] Paulinenkrankenhaus, Bad Bentheim, Germany