Accepted for Publication: February 20, 2012.
Author Contributions: Drs Worni, Schudel, Østbye, Shah, Pietrobon, Marosky Thacker, and Guller and Mr Khare had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Worni, Schudel, Østbye, Marosky Thacker, and Guller. Acquisition of data: Khare and Pietrobon. Analysis and interpretation of data: Worni, Schudel, Østbye, Shah, Khare, Pietrobon, Marosky Thacker, and Guller. Drafting of the manuscript: Worni, Schudel, Østbye, Marosky Thacker, and Guller. Critical revision of the manuscript for important intellectual content: Shah, Khare, and Pietrobon.
Financial Disclosure: None reported.
Funding/Support: This work was supported in part by grants PBBEP3-131567 (Dr Worni) and PBBEP3-134913 (Dr Schudel) from the Swiss National Science Foundation.
Additional Contributions: Danny O. Jacobs, MD, MPH, carefully reviewed the manuscript.