Received: 8 December 2021
Accepted: 2 February 2022
First Online: 9 February 2022
: The study was approved by the ethical committee of the Faculty of Medicine, Al-Azhar University, Cairo, Egypt (Med._147Med.Research. COVID-19 Screening Before Gastrointestinal Procedures. _00000175). Informed consent was obtained from all individual participants included in the study.
: Not applicable
: The authors declare that they have no competing interests.