Study concept and design: Schwartz.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Schwartz.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Schwartz.
Administrative, technical, or material support: Easterling.
Study supervision: Schwartz.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.