Can't sign in? Forgot your password?
Enter your email address below and we will send you the reset instructions
If the address matches an existing account you will receive an email with instructions to reset your password.
Your password has been changed
*Presented before the American Public Health Association at the Seventy-sixth Annual Meeting in Boston, Mass., November 10, 1948.
https://doi.org/10.2105/AJPH.39.2.151
PMID: 18016948
