Campbell, J. A., D. S. Sanders, K. A. Francis, M. Kurien, S. Lee, H. Taha, A. Ramadas, D. Joy, and A. D. Hopper. “Should We Investigate Gastroenterology Patients for Pancreatic Exocrine Insufficiency? A Dual Centre UK Study”. Journal of Gastrointestinal and Liver Diseases, vol. 25, no. 3, Sept. 2016, pp. 303-9, doi:10.15403/jgld.2014.1121.253.uks.