Accepted for Publication: April 1, 2013.
Published Online: July 22, 2013. doi:10.1001/jamainternmed.2013.8972.
Study concept and design: Matulevicius, Rohatgi, Das, Reimold.
Acquisition of data: Matulevicius, Rohatgi, Price, deLuna.
Analysis and interpretation of data: Matulevicius, Rohatgi, Das, Price, Reimold.
Drafting of the manuscript: Matulevicius, Rohatgi, Das.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Matulevicius, Rohatgi, Das, deLuna.
Administrative, technical, and material support: Price, Reimold.
Study supervision: Matulevicius, Rohatgi, Reimold.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported in part by grant UL1TR000451 from The University of Texas Science and Technology Acquisition and Retention program (UT-STAR) and by the National Center for Advancing Translational Sciences and the National Institutes of Health (Dr Matulevicius).
Disclaimer: The content is solely the responsibility of the authors and does not necessarily represent the official views of UT-STAR, The University of Texas Southwestern Medical Center and its affiliated academic and health care centers, the National Center for Advancing Translational Sciences, or the National Institutes of Health.
Additional Contributions: We thank James A. de Lemos, MD, for reviewing the manuscript.