Author Contributions: Drs DuBard and Massing 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: DuBard, Massing.
Acquisition of data: DuBard, Massing.
Analysis and interpretation of data: DuBard, Massing.
Drafting of the manuscript: DuBard, Massing.
Critical revision of the manuscript for important intellectual content: DuBard, Massing.
Statistical analysis: DuBard, Massing.
Administrative, technical, or material support: Massing.
Study supervision: Massing.
Financial Disclosures: None reported.
Acknowledgment: We thank Bill Loomis, BBA, Charles DeWar, BBA, and William Lawrence, MD, North Carolina Department of Health and Human Services Division of Medical Assistance, for providing data access and technical support; Annette Fulcher, RN, and Mignon Benjamin, MD, Carolinas Center for Medical Excellence, for technical assistance; Leighton Ku, PhD, MPH, Pam Silberman, JD, DrPH, and the University of North Carolina National Research Service Award Fellows' Writing Group, for thoughtful review of the manuscript; and the UNC Preventive Medicine Residency Program for support of Dr DuBard during conduction of the study. None of the individuals mentioned in this acknowledgment received additional compensation for their work with this article.