Gomez-Suarez R Difficulties in the diagnosis and management of functional or recurrent abdominal pain children Pediatr Ann 2016;45:e388–e399 Holmes JF, Gladman A, Chang CH Performance of ultrasonography in pediatric blunt trauma patients: a meta-analysis J Pediatric Surg 2007;42:1588–1594 Kharbanda AB, Dudley NC, Bajaj L, et al Validation and refinement of a prediction rule to identify children at low risk for acute appendicitis Arch Pediatr Adolesc Med 2012;166:738–744 Kharbanda AB, Vazquez-Benitez G, Ballard DW, et al Development and validation of a novel pediatric appendicitis risk calculator (pARC) Pediatrics 2018;141(4):e20172699 Kim JR, Suh CH, Yoon HM, et al Performance of MRI for suspected appendicitis in pediatric patients and negative appendectomy rate: a systematic review and meta-analysis J Magn Reson Imaging 2018;47:767–778 Kinner S, Pickhardt PJ, Riedesel EL, et al Diagnostic accuracy of MRI versus CT for the evaluation of acute appendicitis in children and young adults Am J Roentgenol 2017;209:911–919 Levy JA, Bachur RG Bedside ultrasound in the pediatric emergency department Curr Opin Pediatr 2008;20:235–242 McFerron BA, Waseem S Chronic recurrent abdominal pain Pediatric Rev 2012;33:509–516 Mushtaq R, Desoky SM, Morello F, et al First line diagnostic evaluation with MRI of children suspected of having acute appendicitis Radiology 2019;291:170–177 Neuman MI, Ruddy R Approach to the child with acute abdominal pain In: Rose BD, ed UpToDate Waltham, MA: UpToDate Inc, 2018 Roberts KB, Downs SM, et al Reaffirmation of AAP clinical practice guideline: the diagnosis and management of the initial urinary tract infection in febrile infants and young children 2–24 months of age Pediatrics 2016;138:1–5 Roskind CG, Ruzal-Shapiro CB, Dowd EK, et al Test characteristics of the 3view abdominal radiograph series in the diagnosis of intussusception Pediatr Emerg Care 2007;23:785–789 Scaife ER, Rollins MD, Barnhart DC, et al The role of focused abdominal sonography for trauma (FAST) in pediatric trauma evaluation J Pediatr Surg 2013;48:1377–1383