Received: 7 April 2020
Accepted: 21 May 2020
First Online: 14 July 2020
Ethics approval and consent to participate
: The referred subjects were asked for informed written consent after fulfilling the inclusive and exclusive criteria of the study. The study was approved by the ethical committee of Faculty of Medicine, Cairo University. IRB was not necessary according to national regulations at time of starting the study. Committee’s reference number is not available.
: Was taken from all authors