Accepted for Publication: May 9, 2014.
Published Online: August 31, 2014. doi:10.1001/jamainternmed.2014.3258.
Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Pasternak.
Critical revision of the manuscript for important intellectual content: Svanström, Melbye, Hviid.
Statistical analysis: Pasternak, Svanström.
Administrative, technical, or material support: Melbye.
Study supervision: Melbye, Hviid.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This study was presented at the European Society of Cardiology Congress; August 31, 2014; Barcelona, Spain.
Additional Contributions: We thank the Danish HF Registry for providing data for this project.
Correction: This article was corrected online September 10, 2014, for missing previous presentation information.