Skip to main content

Govt building

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure access 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.

M41-2 - Reprints on ethics of randomized studies, by Thomas C. Chalmers, M.D.

 Digital Record
Identifier: ba093d39-cd4b-4aad-adca-bb968b0b9ae1
Digital Object

Go to file