Maternal Black Race and Persistent Wheezing Illness in Former Extremely Low Gestational Age Newborns: Secondary Analysis of a Randomized Trial.

Wai KC, Hibbs AM, Steurer MA, Black DM, Asselin JM, Eichenwald EC, Ballard PL, Ballard RA, Keller RL, Trial of Late Surfactant (TOLSURF) Study Group