Full text
PDF
. 1961 Jul;14(4):448–450. doi: 10.1136/jcp.14.4.448
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.
