An official website of the United States government
Here's how you know
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.
As a library, NLM provides access to scientific literature. Inclusion in an NLM database does not imply endorsement of, or agreement with,
the contents by NLM or the National Institutes of Health.
Learn more:
PMC Disclaimer
|
PMC Copyright Notice
. 1940 Jun;42(6):590–605.
THE 71st ANNUAL MEETING OF THE Canadian Medical Association In Conjunction with the 60th Annual Meeting of the ONTARIO DIVISION OF THE ASSOCIATION TORONTO, JUNE 17, 18, 19, 20, 21, 1940