Funding for this research was provided by:
Ministry of Higher Education, Egypt
Received: 31 March 2021
Accepted: 17 June 2021
First Online: 12 July 2021
: The study was approved by the Institutional Review Board of Leuven University, Belgium. The study is retrospective, and consent to participate was waived by the IRB. The committee’s reference number is not applicable.
: Not applicable.
: The authors declare that they have no competing interests.