In the article on page e19, volume 35, issue 1, the trial registration number, ClinicalTrials.gov NCT01998477, is incorrect. The correct number is ClinicalTrials.gov NCT01682876.
Johnston W, Essink B, Kirstein J, et al. Comparative assessment of a single dose and a 2-dose vaccination series of a quadrivalent meningococcal CRM-conjugate vaccine (MenACWY-CRM) in children 2–10 years of age. Pediatr Infect Dis J. 2016;35:e19–e27.