Received: 27 December 2019
Accepted: 18 September 2020
First Online: 6 October 2020
Ethics approval and consent to participate
: The research project was approved by the ethical committee of the Department of Obstetrics and Gynaecology, Minia University Hospital on 1/4/2016 (Registration number: MUEOB0002). Consent to participate is not applicable as this study reviews secondary aggregated data.
: Not applicable.
: The authors declare that they have no competing interests.