1. Department of Dermatology; University of Lübeck; Lübeck Germany
2. Department of Clinical Pathology; Mansoura University; Mansoura Egypt
3. Department of Dermatology; Faculty of Medicine; Cairo University; Cairo Egypt
4. Department of Dermatology; Zagazig University; Zagazig Egypt
5. Department of Dermatology; Tanta University; Tanta Egypt
6. Department of Dermatology; Mansoura University; Mansoura Egypt