Farmer, Richard G. (September 2010). "The clinical evolution of inflammatory bowel disease, 19 60–2010: An eyewitness account". The American Journal of Gastroenterology. 105 (9): 1922–4. doi:10.1038/ajg.2010.223. PMID20818347. S2CID27721622.
Farmer, Richard G. (September 2010). "The clinical evolution of inflammatory bowel disease, 19 60–2010: An eyewitness account". The American Journal of Gastroenterology. 105 (9): 1922–4. doi:10.1038/ajg.2010.223. PMID20818347. S2CID27721622.
Farmer, Richard G. (September 2010). "The clinical evolution of inflammatory bowel disease, 19 60–2010: An eyewitness account". The American Journal of Gastroenterology. 105 (9): 1922–4. doi:10.1038/ajg.2010.223. PMID20818347. S2CID27721622.