Fig 2. Study flow chart.
Footnotes: CPAP = continuous positive airway pressure. ETI = endotracheal intubation. CS = caesarean section.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.