Author Contributions: Drs Amin and Matchar had full access to all of 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: Amin, Matchar, Wood, Ellenbogen.
Acquisition of data: Amin, Ellenbogen.
Analysis and interpretation of data: Amin, Matchar, Ellenbogen.
Drafting of the manuscript: Amin, Matchar, Wood, Ellenbogen.
Critical revision of the manuscript for important intellectual content: Matchar, Ellenbogen.
Statistical analysis: Amin, Matchar.
Administrative, technical, or material support: Matchar, Ellenbogen.
Study supervision: Matchar, Wood.
Financial Disclosures: Dr Matchar is the director of the Duke Evidence-based Practice Center, commissioned to work with Center for Medicare and Medical Services for purposes of technology assessment. Drs Wood and Ellenbogen participate in device-related clinical research supported by grants from Medtronic, Guidant, St Jude, and Cameron Health. Dr Ellenbogen reports having received honoraria from Medtronic, Guidant, St Jude, and Sorin Biomedica. No other disclosures were reported. None of the outside companies that are mentioned were in any way involved with this work.
Acknowledgment: We thank Shalani Kulasingam, PhD, MPH, from the Center for Clinical Health Policy Research, Duke University, for reviewing the decision analysis model, and Emily Matchar for assistance with copy editing of an early version of the manuscript.