Ahmad, Mohammad, Elizabeth Reynolds, Mahin Chowdhury, Mutwakil Abdalla, and Simon Galloway. “COVID-19 As a Possible Cause for Achalasia: A Case Report”. Journal of Gastrointestinal and Liver Diseases 32, no. 4 (December 22, 2023): 565-566. Accessed March 28, 2025. https://jgld.ro/jgld/index.php/jgld/article/view/5062.