Received: 4 October 2019
Accepted: 23 January 2020
First Online: 16 March 2020
Ethics approval and consent to participate
: The study was conducted in accordance with the ethical principles of the 1975 Declaration of Helsinki, and it was reviewed and approved by Research Ethics Committee of Faculty of Medicine, Zagazig University Institutional Review Board, #5644, in 9 March 2019. A written informed consent was obtained from all the participants after explaining the aim and concerns of the study.
: Not applicable.
: The authors declare that they have no competing interests.