Published Online: November 12, 2012. doi:10.1001/2012.jama.11975
Author Contributions: Dr C.-Y. Wu 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. Drs C.-Y. Wu and Chen contributed equally to this article as first authors; Drs C.-Y. Wu and Lin are both corresponding authors.
Study concept and design: Chun-Ying Wu, Chen, Kuo, Lin.
Acquisition of data: Chun-Ying Wu, Ho, Lin.
Analysis and interpretation of data: Chun-Ying Wu, Chen, Ho, Hsu, Ming-Shiang Wu, Lin.
Drafting of the manuscript: Chun-Ying Wu, Chen.
Critical revision of the manuscript for important intellectual content: Chun-Ying Wu, Chen, Ho, Hsu, Kuo, Ming-Shiang Wu, Lin.
Statistical analysis: Chun-Ying Wu, Chen, Ho, Hsu.
Obtained funding: Chun-Ying Wu, Kuo.
Administrative, technical, or material support: Chun-Ying Wu, Chen, Kuo, Ming-Shiang Wu, Lin.
Study supervision: Chun-Ying Wu, Kuo, Lin.
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: The National Health Research Institutes provided access to the National Health Insurance Research Database (NHIRD) and financial support for the hiring of a research assistant. This work was supported by Taiwan's National Health Research Institute (PH-101-PP-23). This study is based on data from the NHIRD provided by the Bureau of National Health Insurance, Department of Health, and managed by the NHIRD, Taiwan.
Role of the Sponsor: The NHRI had no role in the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.
Disclaimer: The interpretations and conclusions contained in this article do not represent those of the Bureau of National Health Insurance, Department of Health, or the NHRI. National Health Insurance Research Database, Taiwan. http://www.nhri.org.tw/nhird/en/index.htm.