Study design
This prospective randomized controlled trial (RCT) study was conducted at the Dermatology Department Outpatient Clinic, Faculty of Medicine, Cairo University (Kasr Al Aini hospital) during the period from February 2019 to July 2020. The study design was approved by both the Department Scientific and Ethical Committee Boards and informed consents were signed by all participants or guardians for participation in the study. This study was registered in 