Linnaus ME, Notrica DM, Langlais CS, St Peter SD, Leys CM, Ostlie DJ, Maxson RT, Ponsky T, Tuggle DW, Eubanks JW, Bhatia A, Alder AC, Greenwell C, Garcia NM, Lawson KA, Motghare P, Letton RW. Prospective validation of the shock index pediatric-adjusted (SIPA) in blunt liver and spleen trauma: An ATOMAC+ study. J Pediatr Surg. 2017 Feb; 52(2):340-344.