References
1. Podolsky DK. Inflammatory bowel disease. The New England journal of medicine. 2002;347(6):417-29.
2. Shivananda S, Lennard-Jones J, Logan R, Fear N, Price A, Carpenter L, et al. Incidence of inflammatory bowel disease across Europe: is there a difference between north and south? Results of the European Collaborative Study on Inflammatory Bowel Disease (EC-IBD). Gut. 1996;39(5):690-7.
3. Tragnone A, Corrao G, Miglio F, Caprilli R, Lanfranchi GA. Incidence of inflammatory bowel disease in Italy: a nationwide population-based study. Gruppo Italiano per lo Studio del Colon e del Retto (GISC). International journal of epidemiology. 1996;25(5):1044-52.
4. Azevedo LF, Magro F, Portela F, Lago P, Deus J, Cotter J, et al. Estimating the prevalence of inflammatory bowel disease in Portugal using a pharmaco-epidemiological approach. Pharmacoepidemiology and drug safety. 2010;19(5):499-510.
5. Cosnes J, Gower-Rousseau C, Seksik P, Cortot A. Epidemiology and natural history of inflammatory bowel diseases. Gastroenterology. 2011;140(6):1785-94.
6. Molodecky NA, Soon IS, Rabi DM, Ghali WA, Ferris M, Chernoff G, et al. Increasing incidence and prevalence of the inflammatory bowel diseases with time, based on systematic review. Gastroenterology. 2012;142(1):46-54 e42; quiz e30.
7. Ha CY, Newberry RD, Stone CD, Ciorba MA. Patients with late-adult-onset ulcerative colitis have better outcomes than those with early onset disease. Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association. 2010;8(8):682-7 e1.
8. Loftus EV, Jr. Clinical epidemiology of inflammatory bowel disease: Incidence, prevalence, and environmental influences. Gastroenterology. 2004;126(6):1504-17.
9. Carr N, Schofield PF. Inflammatory bowel disease in the older patient. The British journal of surgery. 1982;69(4):223-5.
10. Zimmerman J, Gavish D, Rachmilewitz D. Early and late onset ulcerative colitis: distinct clinical features. Journal of clinical gastroenterology. 1985;7(6):492-8.
11. Riegler G, Tartaglione MT, Carratu R, D'Inca R, Valpiani D, Russo MI, et al. Age-related clinical severity at diagnosis in 1705 patients with ulcerative colitis: a study by GISC (Italian Colon-Rectum Study Group). Digestive diseases and sciences. 2000;45(3):462-5.
12. Hadithi M, Cazemier M, Meijer GA, Bloemena E, Felt-Bersma RJ, Mulder CJ, et al. Retrospective analysis of old-age colitis in the Dutch inflammatory bowel disease population. World journal of gastroenterology : WJG. 2008;14(20):3183-7.
13. Silverberg MS, Satsangi J, Ahmad T, Arnott ID, Bernstein CN, Brant SR, et al. Toward an integrated clinical, molecular and serological classification of inflammatory bowel disease: report of a Working Party of the 2005 Montreal World Congress of Gastroenterology. Canadian journal of gastroenterology = Journal canadien de gastroenterologie. 2005;19 Suppl A:5A-36A.
14. Loftus EV, Jr., Schoenfeld P, Sandborn WJ. The epidemiology and natural history of Crohn's disease in population-based patient cohorts from North America: a systematic review. Alimentary pharmacology & therapeutics. 2002;16(1):51-60.
15. Portela F, Magro F, Lago P, Cotter J, Cremers I, de Deus J, et al. Ulcerative colitis in a Southern European country: a national perspective. Inflammatory bowel diseases. 2010;16(5):822-9.
16. Barreiro-de Acosta M, Magro F, Carpio D, Lago P, Echarri A, Cotter J, et al. Ulcerative colitis in northern Portugal and Galicia in Spain. Inflammatory bowel diseases. 2010;16(7):1227-38.
17. Solberg IC, Lygren I, Jahnsen J, Aadland E, Hoie O, Cvancarova M, et al. Clinical course during the first 10 years of ulcerative colitis: results from a population-based inception cohort (IBSEN Study). Scandinavian journal of gastroenterology. 2009;44(4):431-40.
18. Dignass A, Eliakim R, Magro F, Maaser C, Chowers Y, Geboes K, et al. Second European evidence-based consensus on the diagnosis and management of ulcerative colitis part 1: definitions and diagnosis. Journal of Crohn's & colitis. 2012;6(10):965-90.
19. Vind I, Riis L, Jess T, Knudsen E, Pedersen N, Elkjaer M, et al. Increasing incidences of inflammatory bowel disease and decreasing surgery rates in Copenhagen City and County, 2003-2005: a population-based study from the Danish Crohn colitis database. The American journal of gastroenterology. 2006;101(6):1274-82.
20. Loftus CG, Loftus EV, Jr., Harmsen WS, Zinsmeister AR, Tremaine WJ, Melton LJ, 3rd, et al. Update on the incidence and prevalence of Crohn's disease and ulcerative colitis in Olmsted County, Minnesota, 1940-2000. Inflammatory bowel diseases. 2007;13(3):254-61.
21. Ott C, Obermeier F, Thieler S, Kemptner D, Bauer A, Scholmerich J, et al. The incidence of inflammatory bowel disease in a rural region of Southern Germany: a prospective population-based study. European journal of gastroenterology & hepatology. 2008;20(9):917-23.
22. Matsumoto S, Miyatani H, Yoshida Y. Ulcerative colitis: comparison between elderly and young adult patients and between elderly patients with late-onset and long-standing disease. Digestive diseases and sciences. 2013;58(5):1306-12.
23. Charpentier C, Salleron J, Savoye G, Fumery M, Merle V, Laberenne JE, et al. Natural history of elderly-onset inflammatory bowel disease: a population-based cohort study. Gut. 2014;63(3):423-32.
24. Gower-Rousseau C, Dauchet L, Vernier-Massouille G, Tilloy E, Brazier F, Merle V, et al. The natural history of pediatric ulcerative colitis: a population-based cohort study. The American journal of gastroenterology. 2009;104(8):2080-8.
25. Regueiro M, Kip KE, Cheung O, Hegazi RA, Plevy S. Cigarette smoking and age at diagnosis of inflammatory bowel disease. Inflammatory bowel diseases. 2005;11(1):42-7.
26. Satsangi J, Silverberg MS, Vermeire S, Colombel JF. The Montreal classification of inflammatory bowel disease: controversies, consensus, and implications. Gut. 2006;55(6):749-53.
27. Kalkan IH, Dagli U, Oztas E, Tunc B, Ulker A. Comparison of demographic and clinical characteristics of patients with early vs. adult vs. late onset ulcerative colitis. European journal of internal medicine. 2013;24(3):273-7.
28. Sarlos P, Kovesdi E, Magyari L, Banfai Z, Szabo A, Javorhazy A, et al. Genetic update on inflammatory factors in ulcerative colitis: Review of the current literature. World journal of gastrointestinal pathophysiology. 2014;5(3):304-21.
29. Ruel J, Ruane D, Mehandru S, Gower-Rousseau C, Colombel JF. IBD across the age spectrum: is it the same disease? Nature reviews Gastroenterology & hepatology. 2014;11(2):88-98.
30. Mahid SS, Minor KS, Soto RE, Hornung CA, Galandiuk S. Smoking and inflammatory bowel disease: a meta-analysis. Mayo Clinic proceedings. 2006;81(11):1462-71.
31. Hoie O, Wolters F, Riis L, Aamodt G, Solberg C, Bernklev T, et al. Ulcerative colitis: patient characteristics may predict 10-yr disease recurrence in a European-wide population-based cohort. The American journal of gastroenterology. 2007;102(8):1692-701.
32. Bringiotti R, Ierardi E, Lovero R, Losurdo G, Di Leo A, Principi M. Intestinal microbiota: The explosive mixture at the origin of inflammatory bowel disease? World journal of gastrointestinal pathophysiology. 2014;5(4):550-9.
33. Chen WX, Ren LH, Shi RH. Enteric microbiota leads to new therapeutic strategies for ulcerative colitis. World journal of gastroenterology : WJG. 2014;20(42):15657-63.
34. Quezada SM, Cross RK. Association of age at diagnosis and ulcerative colitis phenotype. Digestive diseases and sciences. 2012;57(9):2402-7.
35. Turner D, Levine A, Escher JC, Griffiths AM, Russell RK, Dignass A, et al. Management of pediatric ulcerative colitis: joint ECCO and ESPGHAN evidence-based consensus guidelines. Journal of pediatric gastroenterology and nutrition. 2012;55(3):340-61.
36. Dignass A, Lindsay JO, Sturm A, Windsor A, Colombel JF, Allez M, et al. Second European evidence-based consensus on the diagnosis and management of ulcerative colitis part 2: current management. Journal of Crohn's & colitis. 2012;6(10):991-1030.
37. Lakatos PL, David G, Pandur T, Erdelyi Z, Mester G, Balogh M, et al. IBD in the elderly population: results from a population-based study in Western Hungary, 1977-2008. Journal of Crohn's & colitis. 2011;5(1):5-13.