Received: 27 May 2020
Accepted: 22 September 2020
First Online: 4 November 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ain Shams University, Faculty of Medicine Research Ethic Committee FWA 000017585 in February 2018. Participation was voluntary and all contributors or their first-degree relatives received detailed information about the aims of this research work and an informed consent was obtained prior to the commencement of the study.
: A written informed consent for the publication was obtained from all the participants (or their first degree relatives).
: All authors declare that they have no competing interest.