Fig. 2. Incidence of asthma by sex from 2004 to 2012: NHIS-NSC database. NHIS-NSC, National Health Insurance Service-National Sample Cohort.
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.