Systematic review of the comorbidity of irritable bowel syndrome with other disorders: What are the causes and implications? William E. Whitehead, Olafur Palsson, Kenneth R. Jones Gastroenterology Volume 122, Issue 4, Pages 1140-1156 (April 2002) DOI: 10.1053/gast.2002.32392 Copyright © 2002 American Gastroenterological Association Terms and Conditions
Fig. 1 Annual outpatient visits by IBS patients and control subjects. (Data from Levy et al.1). Gastroenterology 2002 122, 1140-1156DOI: (10.1053/gast.2002.32392) Copyright © 2002 American Gastroenterological Association Terms and Conditions