[1] Univ Med Ctr, Dept Dermatol Venereol & Allergol, D-68167 Mannheim, Germany
[2] Univ Med Ctr, Dept Nephrol Endocrinol & Rheumatol, D-68167 Mannheim, Germany
[3] Univ Hosp Giessen & Marburg, Dept Dermatol Venereol & Allergol, D-35392 Giessen, Germany