Accepted for Publication: September 22, 2013.
Published Online: December 16, 2013. doi:10.1001/jamainternmed.2013.12700.
Study concept and design: C.-C. Hsu, Tarng.
Acquisition of data: T-W. Hsu, C.-C. Hsu, Tarng.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: T-W. Hsu, Liu.
Critical revision of the manuscript for important intellectual content: Hung, Kuo, Chang, Chen, C.-C. Hsu, Tarng.
Statistical analysis: Liu, Chang.
Obtained funding: C.-C. Hsu, Tarng.
Administrative, technical, or material support: T-W. Hsu, Hung, Kuo, Chang, Chen, C.-C. Hsu.
Study supervision: C.-C. Hsu, Tarng.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by the National Science Council, the Taipei Veterans General Hospital, the National Health Research Institutes, and the National Yang-Ming University.
Role of the Sponsors: The funding sources had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.