1. The Manitoba Inflammatory Bowel Disease Cohort Study: Prolonged Symptoms Before Diagnosis—How Much Is Irritable Bowel Syndrome? 
Twila Burgmann, Ian Clara, Lesley Graff, John Walker, Lisa Lix, Patricia Rawsthorne, Cory McPhail, Linda Rogala, Norine Miller, Charles Noah Bernstein 
Clinical Gastroenterology and Hepatology 
Volume 4, Issue 5, Pages (May 2006)
DOI: /j.cgh
Copyright © 2006 American Gastroenterological Association Institute Terms and Conditions

2. Figure 1 Initial gastrointestinal symptoms before IBD diagnosis.
Clinical Gastroenterology and Hepatology 2006 4, DOI: ( /j.cgh )
Copyright © 2006 American Gastroenterological Association Institute Terms and Conditions

3. Figure 2
Correlation of increasing age at IBD diagnosis and duration of gastrointestinal symptoms before IBD diagnosis (years).
Clinical Gastroenterology and Hepatology 2006 4, DOI: ( /j.cgh )
Copyright © 2006 American Gastroenterological Association Institute Terms and Conditions