Author Contributions: Dr Ingelsson 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: Ingelsson, Sundström,
Acquisition of data: Ingelsson.
Analysis and interpretation of data: Ingelsson,
Sundström, Ärnlöv, Zethelius, Lind.
Drafting of the manuscript: Ingelsson.
Critical analysis of the manuscript for important
intellectual content: Ingelsson, Sundström, Ärnlöv,
Statistical analysis: Ingelsson.
Administrative, technical, or material support:
Study supervision: Sundström, Ärnlöv,
Financial Disclosures: None reported.
Funding/Support: This study was supported by
Primary Health Care in Uppsala County, Swedish Heart Lung Foundation (Hjärt-Lungfonden),
the Ernfors Family Foundation, and Thuréus Foundation.
Role of the Sponsors: The funding sources had
no role in the design and conduct of the study; the collection, analysis,
and interpretation of the data; or the preparation, review, or approval of