Figure 1.
Flow chart of study population. Analyzed data (n = 12,164) were obtained from the Neonatal Research Network of Japan database (2003–2011). GA = gestational age, NICU = neonatal ICU.
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.