Received: 29 October 2019
Accepted: 4 December 2019
First Online: 19 February 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the faculty of medicine, Zagazig University. All participants agreed to participate in the research, after receiving detailed information about the research. Written informed consent for participation in the study was obtained. The ethics reference number is not available.
: Not applicable.
: The authors declare that they have no competing interests.