[1] Azhar Univ Boys, Fac Med, Dept Dermatol & Venereol, Cairo, Egypt
[2] Helwan Univ, Fac Med, Dept Dermatol & Venereol, Cairo, Egypt
[3] Egyptian Minist Hlth & Populat, Cairo Hosp Dermatol & Venereol Al Haud Al Marsoud, Cairo, Egypt
[4] Armed Forces Coll Med AFCM, Dept Dermatol & Venereol, Cairo, Egypt
[5] Cairo Univ, Fac Med, Dept Dermatol & Venereol, Cairo, Egypt
[6] Egyptian Minist Hlth & Populat, Beni Suef Specialized Hosp, Dept Dermatol & Venereol, Bani Suwayf, Egypt
[7] Misr Univ Sci & Technol, Fac Med, Dept Dermatol & Venereol, Giza, Egypt
[8] Alexandria Univ, Fac Med, Dept Dermatol & Venereol, Alexandria, Egypt
[9] Assiut Univ, Fac Med, Dept Dermatol & Venereol, Assiut, Egypt
[10] Egyptian Minist Hlth & Populat, Kafr El Sheikh Gen Hosp, Dept Dermatol & Venereol, Kafr Al Sheikh, Egypt