1. Solberg IC, Vatn MH, H⊘ie O, et al. IBSEN Study Group. Clinical course in Crohn's disease: results of a Norwegian population-based ten-year follow-up study. Clin Gastroenterol Hepatol. 2007; 5:1430–1438.
Article
2. Solberg IC, Lygren I, Jahnsen J, et al. IBSEN Study Group. Clinical course during the first 10 years of ulcerative colitis: results from a population-based inception cohort (IBSEN Study). Scand J Gastroenterol. 2009; 44:431–440.
Article
3. Cosnes J, Bourrier A, Nion-Larmurier I, Sokol H, Beaugerie L, Seksik P. Factors affecting outcomes in Crohn's disease over 15 years. Gut. 2012; 61:1140–1145.
4. Ha CY, Newberry RD, Stone CD, Ciorba MA. Patients with late-adult-onset ulcerative colitis have better outcomes than those with early onset disease. Clin Gastroenterol Hepatol. 2010; 8:682–687.e1.
Article
5. Ananthakrishnan AN. Environmental triggers for inflammatory bowel disease. Curr Gastroenterol Rep. 2013; 15:302.
Article
6. Ananthakrishnan AN. Environmental risk factors for inflammatory bowel disease. Gastroenterol Hepatol (N Y). 2013; 9:367–374.
7. Best WR, Becktel JM, Singleton JW, Kern F Jr. Development of a Crohn's disease activity index. National Cooperative Crohn's Disease Study. Gastroenterology. 1976; 70:439–444.
8. Colombel JF, Rutgeerts P, Reinisch W, et al. Early mucosal healing with infliximab is associated with improved long-term clinical outcomes in ulcerative colitis. Gastroenterology. 2011; 141:1194–1201.
Article
9. Reif S, Klein I, Arber N, Gilat T. Lack of association between smoking and inflammatory bowel disease in Jewish patients in Israel. Gastroenterology. 1995; 108:1683–1687.
Article
10. Björnsson S, Jóhannsson JH. Inflammatory bowel disease in Iceland, 1990–1994: a prospective, nationwide, epidemiological study. Eur J Gastroenterol Hepatol. 2000; 12:31–38.
11. Abernethy B. Searching for the minimal essential information for skilled perception and action. Psychol Res. 1993; 55:131–138.
Article
12. Levenstein S, Prantera C, Varvo V, et al. Stress and exacerbation in ulcerative colitis: a prospective study of patients enrolled in remission. Am J Gastroenterol. 2000; 95:1213–1220.
Article
13. Mittermaier C, Dejaco C, Waldhoer T, et al. Impact of depressive mood on relapse in patients with inflammatory bowel disease: a prospective 18-month follow-up study. Psychosom Med. 2004; 66:79–84.
Article
14. Mawdsley JE, Rampton DS. Psychological stress in IBD: new in- sights into pathogenic and therapeutic implications. Gut. 2005; 54:1481–1491.
15. Higgins PD, Rubin DT, Kaulback K, Schoenfield PS, Kane SV. Systematic review: impact of non-adherence to 5-aminosalicylic acid products on the frequency and cost of ulcerative colitis flares. Aliment Pharmacol Ther. 2009; 29:247–257.
Article
16. Hommel KA, Denson LA, Baldassano RN. Oral medication ad-herence and disease severity in pediatric inflammatory bowel disease. Eur J Gastroenterol Hepatol. 2011; 23:250–254.
Article
17. Kane SV, Cohen RD, Aikens JE, Hanauer SB. Prevalence of non-adherence with maintenance mesalamine in quiescent ulcerative colitis. Am J Gastroenterol. 2001; 96:2929–2933.
Article
18. Sewitch MJ, Abrahamowicz M, Barkun A, et al. Patient non-adherence to medication in inflammatory bowel disease. Am J Gastroenterol. 2003; 98:1535–1544.
Article
19. Hviid A, Svanström H, Frisch M. Antibiotic use and inflammatory bowel diseases in childhood. Gut. 2011; 60:49–54.
Article
20. Sartor RB. Microbial influences in inflammatory bowel diseases. Gastroenterology. 2008; 134:577–594.
Article
21. Chassaing B, Darfeuille-Michaud A. The commensal microbiota and enteropathogens in the pathogenesis of inflammatory bowel diseases. Gastroenterology. 2011; 140:1720–1728.
Article
22. Singh S, Graff LA, Bernstein CN. Do NSAIDs, antibiotics, infections, or stress trigger flares in IBD? Am J Gastroenterol. 2009; 104:1298–1313. quiz 1314.
Article
23. Spooren CE, Pierik MJ, Zeegers MP, Feskens EJ, Masclee AA, Jonkers DM. Review article: the association of diet with onset and relapse in patients with inflammatory bowel disease. Aliment Pharmacol Ther. 2013; 38:1172–1187.
Article