Els van de Vijver

53 REFERENCES 1. Oliveira SB, Monteiro IM. Diagnosis and management of inflammatory bowel disease in children. BMJ 2017;357:j2083 2. Turner D, Benchimol EI, Dunn H, Griffiths AM, Frost K, Scaini V, Avolio J, Ling SC. Pico Salax versus polyethylene glycol for bowel cleanout before colonoscopy in children: a randomized controlled trial. Endoscopy 2009; 41(12):1038-45. 3. Holtman GA, Lisman-van Leeuwen Y, Day AS, Fagerberg UL, Henderson P, Leach ST, Perminow G, Mack D, van Rheenen PF, van de Vijver E, Wilson DC, Reitsma JB, Berger MY. Use of laboratory markers in addition to symptoms for diagnosis of inflammatory bowel disease in children: a meta-analysis of individual patient data. JAMA Pediatr 2017;171(10):984-991. 4. Henderson P, Anderson NH, Wilson DC. The diagnostic accuracy of fecal calprotectin during the investigation of suspected pediatric inflammatory bowel disease: a systematic review and meta-analysis. Am J Gastroenterol. 2014;109(5):637-45. 5. Foell D, Wittkowski H, Roth J. Monitoring disease activity by stool analyses: from occult blood to molecular markers of intestinal inflammation and damage. Gut . 2009;58(6):859- 868. 6. Holtman GA, Lisman-van Leeuwen Y, Reitsma JB, Berger MY. Noninvasive Tests for Inflammatory Bowel Disease: A Meta-analysis. Pediatrics . 2016;137(1):2015-2126. 7. Heida A, Holtman GA, Lisman-Van Leeuwen Y, Berger MY, Van Rheenen PF. Avoid Endoscopy in Children With Suspected Inflammatory Bowel Disease Who Have Normal Calprotectin Levels. J Pediatr Gastroenterol Nutr . 2016;62:47-49. 8. de Jong NSH, Leach ST, Day AS. Fecal S100A12: a novel noninvasive marker in children with Crohn’s disease. Inflamm Bowel Dis . 2006;12(7):566-572. 9. Sidler MA, Leach ST, Day AS. Fecal S100A12 and fecal calprotectin as noninvasive markers for inflammatory bowel disease in children. Inflamm Bowel Dis . 2008;14(3):359- 366. 10. van de Logt F, Day AS. S100A12: a noninvasive marker of inflammation in inflammatory bowel disease. J Dig Dis . 2013;14(2):62-67. 11. Knottnerus JA, Muris JW. Assessment of the accuracy of diagnostic tests: the cross- sectional study. In: Knottnerus JA, Buntinx F, editors. The evidence base of clinical diagnosis: theory and methods of diagnostic research. Chichester: Wiley-Blackwell; 2009. P. 42-62. 12. Heida A, Van de Vijver E, Muller Kobold A, van Rheenen P. Selecting children with suspected inflammatory bowel disease for endoscopy with the calgranulin C or calprotectin stool test: protocol of the CACATU study. BMJ Open . 2017;7(5):e015636. 13. Heida A, Muller Kobold A, Wagenmakers L, van de Belt J, van Rheenen P. Reference values of fecal calgranulin C (S100A12) in school aged children and adolescents. Clin Chem Lab Med . 2017;epub ahead of print. 14. Levine A, Koletzko S, Turner D, et al. ESPGHAN revised porto criteria for the diagnosis of inflammatory bowel disease in children and adolescents. J Pediatr Gastroenterol Nutr . 2014;58(6):795-806. 15. Naaktgeboren C, De Groot J, van Smeden M, Moons K, Reitsma J. Evaluating diagnostic accuracy in the face of multiple reference standards. Ann Intern Med . 2013;159(3):195-202. 16. de Groot JAH, Dendukuri N, Janssen KJM, Reitsma JB, Bossuyt PMM, Moons KGM. Adjusting for differential-verification bias in diagnostic-accuracy studies: a Bayesian approach. Epidemiology . 2011;22(2):234-241. Head-to-head comparison Calgranulin C and Calprotectin 53