Accepted for Publication: July 21, 2012.
Published Online: November 26, 2012. doi:10.1001/2013.jamainternmed.717
Author Contributions:Study concept and design: Derose, Green, Tunceli, Cheetham, and Reynolds. Acquisition of data: Cheetham and Vansomphone. Analysis and interpretation of data: Derose, Green, Marrett, Tunceli, Cheetham, Chiu, Harrison, Reynolds, and Scott. Drafting of the manuscript: Derose. Critical revision of the manuscript for important intellectual content: Derose, Green, Marrett, Tunceli, Cheetham, Chiu, Harrison, Reynolds, Vansomphone, and Scott. Statistical analysis: Derose, Tunceli, and Chiu. Obtained funding: Derose. Administrative, technical, and material support: Green, Marrett, Harrison, Vansomphone, and Scott. Study supervision: Derose.
Conflict of Interest Disclosures: Ms Marrett is an employee of Merck. Dr Tunceli is an employee of Merck and owns stock in the company.
Funding/Support: This research was supported by grants from Merck Sharp & Dohme Corp, a subsidiary of Merck & Co Inc, Whitehouse Station, New Jersey.
Additional Contributions: The Kaiser Permanente Southern California outreach team personnel supported the implementation of this study. Portia Summers, BS, reviewed and prepared the manuscript. Sponsors were consulted in the design of the study, including the analytic approach, and provided interpretation of results.