1 Division of Dermatology, Department of Medicine, King Abdulaziz Medical City, Riyadh, Saudi Arabia.
2 Division of Pediatric Dermatology, Department of Pediatrics, King Abdullah Specialist Children's Hospital, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia.
3 Division of Pediatric Dermatology, Department of Pediatrics, King Abdullah Specialist Children's Hospital, Riyadh, Saudi Arabia.