1. Dermatology, Venereology and Andrology Department; Ain Shams University; Cairo Egypt
2. Dermatology Department; Cairo University; Cairo Egypt
3. Dermatology and Venereology Department; Minya University; Al- Minya Egypt
4. Haud El Marsoud Dermatology Hospital; MOH; Cairo Egypt
5. Histology & Cell Biology Department; Cairo University; Cairo Egypt