Full text
PDF
. 1906 Aug 11;2(2380):301–302. doi: 10.1136/bmj.2.2380.301
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.