Yousif, Walid Ibrahim. “COVID-19 and Alimentary Tract: Current Evidence and Recent Recommendations”. AL-Kindy College Medical Journal 17, no. 2 (August 30, 2021): 62–72. Accessed May 4, 2024. https://jkmc.uobaghdad.edu.iq/index.php/MEDICAL/article/view/311.