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.
Forest plot: effect of BiPAP and CPAP on duration of noninvasive ventilation needed to resolve pulmonary oedema. BiPAP, bi-level positive airway pressure; CI, confidence interval; CPAP, continuous positive airway pressure; WMD, weighted mean difference.
