Received: 7 October 2019
Accepted: 25 February 2020
First Online: 24 March 2020
Ethics approval and consent to participate
: The study was approved by the Ethical Research Committee (ERC) of the Faculty of Medicine, Tanta University under the code 30383/06/15. All participants of the study gave their written consent to participate in the study.
: The authors declare that they have no competing interests.