Published Online: November 3, 2014. doi:10.1001/jamainternmed.2014.5426.
Study concept and design: Nelson, Elmendorf.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Nelson, Elmendorf.
Critical revision of the manuscript for important intellectual content: All authors.
Administrative, technical, or material support: Nelson, Elmendorf.
Study supervision: Mead.
Conflict of Interest Disclosures: None reported.
Disclaimer: The findings and conclusions in this article are those of the authors and do not necessarily represent the official position of the Centers for Disease Control and Prevention.
Additional Contributions: We are extremely grateful to the patients for sharing their experiences. We also thank Denise Levitan, MD, and Richard Krumdieck, MD, for their helpful input. Neither Dr Levitan nor Dr Krumdieck received compensation.