Author Contributions: Dr Lurie 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: Lurie, Almeida, N. Stine, Wolfe.
Acquisition of data: Lurie, Almeida, N. Stine.
Analysis and interpretation of data: Lurie, Almeida, N. Stine, A. Stine, Wolfe.
Drafting of the manuscript: Lurie, Almeida.
Critical revision of the manuscript for important intellectual content: Lurie, Almeida, N. Stine, A. Stine, Wolfe.
Statistical analysis: Lurie, Almeida, N. Stine, A. Stine.
Administrative, technical, or material support: Wolfe.
Study supervision: Lurie, Wolfe.
Financial Disclosures: None reported.
Acknowledgment: Willam F. McCarthy, PhD, of the Maryland Research Institute provided advice on statistical approaches to measuring the impact of conflicts on voting behavior (he received no compensation for this advice). Meredith Larson of Public Citizen's Health Research Group entered the data on voting behavior.