Article History
Received: 26 June 2020
Accepted: 22 November 2020
First Online: 7 January 2021
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: The study was approved by the Dermatology Research Ethical Committee (Derma REC) at Faculty of Medicine, Cairo University; and standards of research ethics according to the Declaration of Helsinki were adopted.
: From all persons involved in this research, a written, informed consent to participate in the study and to be photographed was obtained.