Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: All authors.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Ehrhardt, Meinert.
Administrative, technical, or material support: Appel.
Study supervision: Ehrhardt.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Appel reported receiving grants from the National Institutes of Health to conduct clinical trials. Dr Meinert reported receiving grants from the National Institutes of Health and industry funding to conduct clinical trials. No other disclosures were reported.
Additional Contributions: We are indebted to Jill Meinert (Johns Hopkins Bloomberg School of Public Health) for technical assistance for which she was not compensated.