Received: 4 January 2018
Accepted: 24 October 2018
First Online: 20 November 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee for Clinical Research of the Faculty of Medicine for Girls, Al-Azhar University in December 2015, reference number not available.All subjects were informed of the general aim of the study, and their participation in the study was fully voluntary. All participants provided informed written consent to participate in the study.
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.