Study concept and design: Sege.
Acquisition, analysis, or interpretation of data: All authors.
Drafting of the manuscript: Sege, Selk.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: All authors.
Obtained funding: Sege.
Administrative, technical, or material support: Sege, Nykiel-Bub.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: The Medical Foundation Division of Health Resources in Action provided access to the administrative data.
Role of the Funder/Sponsor: The Medical Foundation Division of Health Resources in Action had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Correction: This article was corrected on October 1, 2015, to fix 1 error in Table 1 and 1 error in Table 2.