Slavova, Mila Kovacheva-, Sylvie Siminkovitch, Plamen Gecov, Jordan Genov, Branimir Golemanov, Rumyana Mitova, and Borislav Vladimirov. “Up-To-Date Approach To Monitor Pancreatic Exocrine Insufficiency In Adult Patients With Cystic Fibrosis”. International Journal of Medical Science and Clinical Invention 4, no. 12 (December 30, 2017): 3358–3360. Accessed May 5, 2024. https://valleyinternational.net/index.php/ijmsci/article/view/1003.