Submitted for Publication: March 11, 2014; final revision received May 4, 2014; accepted May 29, 2014.
Published Online: July 24, 2014. doi:10.1001/jamaoto.2014.1249.
Study concept and design: Basura, Telian.
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: Basura, Lin.
Administrative, technical, or material support: All authors.
Study supervision: Telian.
Conflict of Interest Disclosures: None reported.
Additional Contributions: David A, Hanauer, MD, MS, University of Michigan Medical School, assisted with providing The Electronic Medical Record Search Engine, which generated the extensive compilation of data for the study groups.