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Background:
How the Study Was Conducted:
Results:
Discussion:
( JAMA Intern Med . Published online May 12, 2014. doi:10.1001/jamainternmed.2014.1582. Available pre-embargo to the media at http://media.jamanetwork.com .)
Editor's Note:
This work was supported by a variety of grants from different funding sources. Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, funding and support, etc.
Media Advisory:
To contact author Richard D. Semba, M.D., M.P.H., call Stephanie Desmon at 410-955-8665 or email sdesmon1@jhmi.edu .
JAMA Internal Medicine