An error occurred in the article by Carey WA et al, titled “Inhaled Nitric Oxide in Extremely Premature Neonates With Respiratory Distress Syndrome” published in the March 2018 issue of Pediatrics (2018;141[3]: e20173108; doi:10.1542/peds.2017-3108). On page 5, in Fig 1, the “No iNO within first 7 days” box reads “N = 39 916”. It should have read: “N = 36 916.”