Received: 9 July 2019
Accepted: 31 October 2019
First Online: 23 December 2019
Ethics approval and consent to participate
: A written informed consent was taken from all of the participants after explaining details and benefits as well as risks to them. The ethical committee of Faculty of Medicine, Zagazig University, approved this study. The ethics committee’s reference number is ZU-IRB#5624/1-6-2019.
: Not applicable.
: The authors declare that they have no competing interests.