1. Inflammatory Bowel Disease in South Limburg (the Netherlands) 1991–2002: Incidence, diagnostic delay, and seasonal variations in onset of symptoms 
Mariëlle J.L. Romberg-Camps, Martine A.M. Hesselink-van de Kruijs, Leo J. Schouten, Pieter C. Dagnelie, Charles B. Limonard, Arnold D.M. Kester, Laurens P. Bos, Jelle Goedhard, Wim H.A. Hameeteman, Frank L. Wolters, Maurice G.V.M. Russel, Reinhold W. Stockbrügger 
Journal of Crohn's and Colitis 
Volume 3, Issue 2, Pages (June 2009)
DOI: /j.crohns
Copyright © Terms and Conditions

2. Figure 1
Standardized incidence rates per 100,000 person-years, 1991–2002, based on the 3-years moving average.
Journal of Crohn's and Colitis 2009 3, DOI: ( /j.crohns )
Copyright © Terms and Conditions

3. Figure 2
Age-specific standardized incidence rates per 100,000 person-years 1991–2002.
Journal of Crohn's and Colitis 2009 3, DOI: ( /j.crohns )
Copyright © Terms and Conditions

4. Figure 3
Overall variation per month in onset of symptoms for CD, UC and IC (n=1122).
Journal of Crohn's and Colitis 2009 3, DOI: ( /j.crohns )
Copyright © Terms and Conditions