van der Zaag-Loonen HJ, Casparie M, Taminiau JA, Escher JC, Pereira RR, Derkx HH: The incidence of pediatric inflammatory bowel disease in the Netherlands: 1999-2001. J Pediatr Gastroenterol Nutr. 2004, 38 (3): 302-307.
Gieteling MJ, Lisman-van Leeuwen Y, van der Wouden JC, Schellevis FG, Berger MY: Childhood nonspecific abdominal pain in family practice: incidence, associated factors, and management. Ann Fam Med. 2011, 9 (4): 337-343.
Rasquin A, Di Lorenzo C, Forbes D, Guiraldes E, Hyams JS, Staiano A, Walker LS: Childhood functional gastrointestinal disorders: child/adolescent. Gastroenterology. 2006, 130 (5): 1527-1537.
van Rheenen PF, Van de Vijver E, Fidler V: Faecal calprotectin for screening of patients with suspected inflammatory bowel disease: diagnostic meta-analysis. BMJ. 2010, 341: c3369-
Roseth AG, Schmidt PN, Fagerhol MK: Correlation between faecal excretion of indium-111-labelled granulocytes and calprotectin, a granulocyte marker protein, in patients with inflammatory bowel disease. Scand J Gastroenterol. 1999, 34 (1): 50-54.
Bunn SK, Bisset WM, Main MJ, Gray ES, Olson S, Golden BE: Fecal calprotectin: validation as a noninvasive measure of bowel inflammation in childhood inflammatory bowel disease. J Pediatr Gastroenterol Nutr. 2001, 33 (1): 14-22.
Canani RB, de Horatio LT, Terrin G, Romano MT, Miele E, Staiano A, Rapacciuolo L, Polito G, Bisesti V, Manguso F, Vallone G, Sodano A, Troncone R: Combined use of noninvasive tests is useful in the initial diagnostic approach to a child with suspected inflammatory bowel disease. J Pediatr Gastroenterol Nutr. 2006, 42 (1): 9-15.
Diamanti A, Panetta F, Basso MS, Forgione A, Colistro F, Bracci F, Papadatou B, Francalanci P, Torroni F, Knafelz D, Fina F, Castro M: Diagnostic work-up of inflammatory bowel disease in children: the role of calprotectin assay. Inflamm Bowel Dis. 2010, 16 (11): 1926-1930.
Buntinx F, Mant D, Van den Bruel A, Donner-Banzhof N, Dinant GJ: Dealing with low-incidence serious diseases in general practice. Br J Gen Pract. 2011, 61 (582): 43-46.
Levine A, Griffiths A, Markowitz J, Wilson DC, Turner D, Russell RK, Fell J, Ruemmele FM, Walters T, Sherlock M, Dubinsky M, Hyams JS: Pediatric modification of the Montreal classification for inflammatory bowel disease: the Paris classification. Inflamm Bowel Dis. 2011, 17 (6): 1314-1321.
Whiting PF, Rutjes AW, Westwood ME, Mallett S, Deeks JJ, Reitsma JB, Leeflang MM, Sterne JA, Bossuyt PM: QUADAS-2 Group. QUADAS-2: a Revised Tool for the Quality Assessment of Diagnostic Accuracy Studies. Ann Intern Med. 2011, 155 (8): 529-536.
Knottnerus JA, Dinant GJ: Medicine based evidence, a prerequisite for evidence based medicine. BMJ. 1997, 315 (7116): 1109-1110.
Jellema P, van Tulder MW, van der Horst HE, Florie J, Mulder CJ, van der Windt DA: Inflammatory bowel disease: a systematic review on the value of diagnostic testing in primary care. Colorectal Dis. 2011, 13 (3): 239-254.
Lewis SJ, Heaton KW: Stool form scale as a useful guide to intestinal transit time. Scand J Gastroenterol. 1997, 32 (9): 920-924.
Dutch association for pediatrics: CBO Dutch evidence based guidelines on the diagnosis and treatment of IBD in children. 2008, Utrecht: Van Zuiden Communications
Baber KF, Anderson J, Puzanovova M, Walker LS: Rome II versus Rome III classification of functional gastrointestinal disorders in pediatric chronic abdominal pain. J Pediatr Gastroenterol Nutr. 2008, 47 (3): 299-302.
Caplan A, Walker L, Rasquin A: Development and preliminary validation of the questionnaire on pediatric gastrointestinal symptoms to assess functional gastrointestinal disorders in children and adolescents. J Pediatr Gastroenterol Nutr. 2005, 41 (3): 296-304.
Caplan A, Walker L, Rasquin A: Validation of the pediatric Rome II criteria for functional gastrointestinal disorders using the questionnaire on pediatric gastrointestinal symptoms. J Pediatr Gastroenterol Nutr. 2005, 41 (3): 305-316.
de Boer RF, Ott A, Kesztyus B, Kooistra-Smid AM: Improved detection of five major gastrointestinal pathogens by use of a molecular screening approach. J Clin Microbiol. 2010, 48 (11): 4140-4146.
Roseth AG, Fagerhol MK, Aadland E, Schjonsby H: Assessment of the neutrophil dominating protein calprotectin in feces. A methodologic study. Scand J Gastroenterol. 1992, 27 (9): 793-798.
Ton H, Brandsnes , Dale S, Holtlund J, Skuibina E, Schjonsby H, Johne B: Improved assay for fecal calprotectin. Clin Chim Acta. 2000, 29 (1-2): 41-54.
Pels LP, Van de Vijver E, Waalkens HJ, Uitentuis J, Gonera-de Jong G, van Overbeek LA, Norbruis OF, Rings EH, van Rheenen PF: Slow hematological recovery in children with IBD-associated anemia in cases of "expectant management". J Pediatr Gastroenterol Nutr. 2010, 51 (6): 708-713.
Van de Vijver E, Schreuder AB, Cnossen WR, Muller Kobold AC, van Rheenen PF, North Netherlands Pediatric IBD Consortium: Safely ruling out inflammatory bowel disease in children and teenagers without referral for endoscopy. Arch Dis Child. 2012, 97 (12): 1014-1018.
Mack DR, Langton C, Markowitz J, LeLeiko N, Griffiths A, Bousvaros A, Evans J, Kugathasan S, Otley A, Pfefferkorn M, Rosh J, Mezoff A, Moyer S, Oliva-Hemker M, Rothbaum R, Wyllie R, delRosario JF, Keljo D, Lerer T, Hyams J, Pediatric Inflammatory Bowel Disease Collaborative Research Group: Laboratory values for children with newly diagnosed inflammatory bowel disease. Pediatrics. 2007, 119 (6): 1113-1119.
Bremner A, Roked S, Robinson R, Phillips I, Beattie M: Faecal calprotectin in children with chronic gastrointestinal symptoms. Acta Paediatr. 2005, 94 (12): 1855-1858.
Carroccio A, Iacono G, Cottone M, Di Prima L, Cartabellotta F, Cavataio F, Scalici C, Montalto G, Di Fede G, Rini G, Notarbartolo A, Averna MR: Diagnostic accuracy of fecal calprotectin assay in distinguishing organic causes of chronic diarrhea from irritable bowel syndrome: a prospective study in adults and children. Clin Chem. 2003, 49 (6 Pt 1): 861-867.
Fagerberg UL, Loof L, Myrdal U, Hansson LO, Finkel Y: Colorectal inflammation is well predicted by fecal calprotectin in children with gastrointestinal symptoms. J Pediatr Gastroenterol Nutr. 2005, 40 (4): 450-455.
Buderer NM: Statistical methodology: I Incorporating the prevalence of disease into the sample size calculation for sensitivity and specificity. Acad Emerg Med. 1996, 3 (9): 895-900.
Reitsma JB, Rutjes AW, Khan KS, Coomarasamy A, Bossuyt PM: A review of solutions for diagnostic accuracy studies with an imperfect or missing reference standard. J Clin Epidemiol. 2009, 62 (8): 797-806.
de Groot JA, Dendukuri N, Janssen KJ, Reitsma JB, Bossuyt PM, Moons KG: Adjusting for differential-verification bias in diagnostic-accuracy studies: a Bayesian approach. Epidemiology. 2011, 22 (2): 234-241.
Naaktgeboren CA, de Groot JAH, van Smeden M, Moons KGM, Reitsma JB: Evaluating diagnostic accuracy in the face of multiple reference standards. Ann Intern Med. 2013, 159 (3): 195-202.
Mulherin SA, Miller WC: Spectrum bias or spectrum effect? Subgroup variation in diagnostic test evaluation. Ann Intern Med. 2002, 137 (7): 598-602.
The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1471-2296/14/179/prepub