Fig. 1.
Flow diagram of the study selection process. CH, congenital hypothyroidism; P-CH, permanent congenital hypothyroidism; T-CH, transient congenital hypothyroidism.
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.