Study concept and design: Barreto-Filho, Wang, Krumholz
Acquisition of data: Krumholz
Analysis and interpretation of data: Barreto-Filho, Wang, Dodson, Desai, Sugeng, Geirsson, Krumholz
Drafting of the manuscript: Barreto-Filho, Krumholz
Critical revision of the manuscript for important intellectual content: Barreto-Filho, Wang, Dodson, Sugeng, Geirsson, Krumholz
Statistical analysis: Wang
Obtained funding: Krumholz
Administrative, technical, or material support: Krumholz
Study supervision: Krumholz
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Krumholz reported that he works under contract with the Centers for Medicare & Medicaid Services to develop and maintain performance measures. He is chair of a cardiac scientific advisory board for UnitedHealth and the recipient of a research grant from Medtronic, through Yale University, to develop methods of clinical trial data sharing. No other conflicts were reported.
Funding/Support: This work was supported by grant U01HL105270-04 (Center for Cardiovascular Outcomes Research at Yale University) from the National Heart, Lung, and Blood Institute. During the time that this work was conducted, Dr Barreto-Filho was a postdoctoral fellow at Yale University supported by grant 3436-10-1 from CAPES (Coordenação de Aperfeicoamento de Pessoal de Nível Superior, Ministry of Education, Brazil).
Role of the Sponsors: The sponsors had no role in the design and conduct of the study; in the collection, management, analysis, and interpretation of the data; in the preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Correction: This artcle was corrected on November 19, 2013, to amend an author affiliation.