Corrigendum: Use of autologous cord blood mononuclear cells infusion for the prevention of bronchopulmonary dysplasia in extremely preterm neonates: a study protocol for a placebo-controlled randomized multicenter trial [NCT03053076] - Ren, Zhuxiao; Fang, Xu; Zhang, Qi; Mai, Y. G.; Tang, X. Y.; Wang, Q. Q.; Lai, C. H.; Mo, W. H.; Dai, Y. H.; Meng, Q.; Wu, Jing; Ao, Z. Z.; et al. (Frontiers in Pediatrics, 2023)