Full text
PDFPage 54P
. 1969 Oct;114(4):54P. doi: 10.1042/bj1140054pa
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.