1. Department of Dermatology, College of Medicine, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
2. Department of Dermatology, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
3. Department of Medicine, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
4. Department of Dermatology, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
5. Department of Dermatology, Medical Collage, King Faisal University, Al Hufof, Saudi Arabia
6. Department of Dermatology, King Faisal University, Al Hofuf, Saudi Arabia
7. Department of Dermatology, King Fahad Medical City, Riyadh, Saudi Arabia