Funding for this research was provided by:
Ministry of Higher Education, Egypt
Received: 18 September 2020
Accepted: 9 December 2020
First Online: 18 December 2020
Ethics approval and consent to participate
: All participants provided written informed consent prior to participation. This study was approved by Medical Faculty, Friedrich-Alexander University Erlangen- Nürnberg.
: Not applicable.
: The authors declare that they have no competing interests.