Bruet S, Butin M, Dutheil F. Systematic review of high-flow nasal cannula versus continuous positive airway pressure for primary support in preterm infants. Arch Dis Child Fetal Neonatal Ed. 2021 May 20:fetalneonatal-2020-321094. doi: 10.1136/archdischild-2020-321094. Epub ahead of print. PMID: 34016651.