Author Contributions: Study concept and design: Minder, Blaha, Tam, Muñoz, Michos, Kaul, and Blumenthal. Acquisition of data: Minder. Analysis and interpretation of data: Minder, Blaha, Kaul, and Blumenthal. Drafting of the manuscript: Minder, Blaha, Tam, Muñoz, Michos, and Blumenthal. Critical revision of the manuscript for important intellectual content: Minder, Michos, Kaul, and Blumenthal. Statistical analysis: Kaul. Administrative, technical, and material support: Tam and Muñoz. Study supervision: Blaha, Michos, and Blumenthal.
Financial Disclosure: None reported.
This article was corrected for a typographical error on October 26, 2011.