The .gov means it's official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site.
The site is secure.
The https:// ensures that you're connecting to the official website and that any information you provide is encrypted and sent securely.
If you are a Veteran in crisis or concerned about one, connect with our caring, qualified responders for confidential help. Many of them are Veterans themselves.
Get more resources at VeteransCrisisLine.net.
Search | Search by Center | Search by Source | Keywords in Title
Garrido MM. Covariate Adjustment and Propensity Score. [Letter to the Editor]. JAMA : the journal of the American Medical Association. 2016 Apr 12; 315(14):1521-2.