1. Sleep Disturbance and Risk of Active Disease in Patients With Crohn's Disease and Ulcerative Colitis 
Ashwin N. Ananthakrishnan, Millie D. Long, Christopher F. Martin, Robert S. Sandler, Michael D. Kappelman 
Clinical Gastroenterology and Hepatology 
Volume 11, Issue 8, Pages (August 2013)
DOI: /j.cgh
Copyright © 2013 AGA Institute Terms and Conditions

2. Figure 1 Flow chart establishing study cohort.
Clinical Gastroenterology and Hepatology  , DOI: ( /j.cgh )
Copyright © 2013 AGA Institute Terms and Conditions