Author Contributions: Mr Grøntved had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Grøntved, Hu.
Acquisition of data: Grøntved, Hu.
Analysis and interpretation of data: Grøntved, Hu.
Drafting of the manuscript: Grøntved, Hu.
Critical revision of the manuscript for important intellectual content: Grøntved, Hu.
Statistical analysis: Grøntved.
Obtained funding: Grøntved, Hu.
Administrative, technical, or material support: Grøntved, Hu.
Study supervision: Hu.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: Mr Grøntved is supported by the Danish Heart Foundation, Sygekassernes Helsefond (the Danish Health Fund), the Oticon Foundation, and the Augustinus Foundation. Dr Hu is supported by National Institutes of Health grant DK58845 and P30 DK46200.
Role of the Sponsor: None of the funding sponsors was involved in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript.