Mahajan, Prashant; Kuppermann, Nathan; Tunik, Michael; Yen, Kenneth; Atabaki, Shireen M.; Lee, Lois K.; Ellison, Angela M.; Bonsu, Bema K.; Olsen, Cody S.; Cook, Larry; Kwok, Maria Y.; Lillis, Kathleen; Holmes, James F.; the Intra‐abdominal Injury Study Group of the Pediatric Emergency Care Appli...