Funding for this research was provided by:
Science and Technology Development Fund (5380)
Received: 10 June 2021
Accepted: 24 September 2021
First Online: 8 October 2021
: This study was designed according to 1975 Helsinki Declaration ethical guidelines and approved by Cairo University Research Ethics committee (N-65-2014). An informed written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.