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.
Air-jet–induced cortical arousals, as percentage of total arousals during active sleep (AS) and quiet sleep (QS) in supine and prone positions; (A) AS-Supine, (B) QS-Supine, (C) AS-Prone, (D) QS-Prone. Symbols represent significant differences between infants exposed to maternal smoking (■) and controls (□); *P < 0.05, ***P < 0.001.
