Full text
PDF
. 1901 Nov 2;2(2131):1323–1324. doi: 10.1136/bmj.2.2131.1323
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.