| Study | Reason for exclusion |
|---|---|
| Antunes 2003 | Intervention was started after 48 hours of life |
| Imam 2019 | Intervention was provided for 6 hours only |
| Wu 2015 | Mean birth weight was > 2.5 kg (2.75 ± 0.58 in intervention group and 2.92 ± 0.64 in control group), suggesting that included newborns were not ≤ 32 weeks' gestational age as specified in this review |
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.