1. The Prevalence and Geographic Distribution of Crohn’s Disease and Ulcerative Colitis in the United States 
Michael D. Kappelman, Sheryl L. Rifas–Shiman, Ken Kleinman, Dan Ollendorf, Athos Bousvaros, Richard J. Grand, Jonathan A. Finkelstein 
Clinical Gastroenterology and Hepatology 
Volume 5, Issue 12, Pages (December 2007)
DOI: /j.cgh
Copyright © 2007 AGA Institute Terms and Conditions

2. Figure 1
Age-specific prevalence of CD (♦) and UC (■) per 100,000 persons in the United States, 2004.
Clinical Gastroenterology and Hepatology 2007 5, DOI: ( /j.cgh )
Copyright © 2007 AGA Institute Terms and Conditions