1. Munkholm P, Langholz E, Nielsen OH, Kreiner S, Binder V. Incidence and prevalence of Crohn's disease in the county of Copenhagen, 1962-87: a sixfold increase in incidence. Scand J Gastroenterol 1992;27:609-614.
2. Harper PH, Fazio VW, Lavery IC, Jagelman DG, Weakley FL, Farmer RG, Easley KA. The long-term outcome in Crohn’s disease. Dis Colon Rectum 1987;30:174-179.
3. Brown AL, Skehan SJ, Greaney T, Rawlinson J, Somers S, Stevenson GW. Value of double-contrast barium enema performed immediately after incomplete colonoscopy. AJR Am J Roentgenol 2001;176:943-945.
4. Marmo R, Rotondano G, Piscopo R, Bianco MA, Siani A, Catalano O, Cipolletta L. Capsule endoscopy versus enteroclysis in the detection of small-bowel involvement in Crohn’s disease: a prospective trial. Clin Gastroenterol Hepatol 2005;3:772-776.
5. Triester SL, Leighton JA, Leontiadis GI, Gurudu SR, Fleischer DE, Hara AK, Heigh RI, Shiff AD, Sharma VK. A meta-analysis of the yield of capsule endoscopy compared to other diagnostic modalities in patients with non-stricturing small bowel Crohn’s disease. Am J Gastroenterol 2006;101:954-964.