1. Department of Dermatology, Andrology and STIs; Ain Shams University Hospital; Cairo Egypt
2. Department of Dermatology and Allergology, Städtisches Klinikum; Academic Teaching Hospital of the Technical University of Dresden; Dresden Germany
3. Departments of Dermatology, Venereology, Allergology and Immunology; Dessau Medical Center, Brandenburg Medical School Theodore Fontane; Dessau Germany