Author Contributions: Mr Bowman had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Bowman, Zimmerman, Christakis, Martin.
Acquisition of data: Bowman, Christakis.
Analysis and interpretation of data: Bowman, Zimmerman, Christakis, Sharar.
Drafting of the manuscript: Bowman, Zimmerman.
Critical revision of the manuscript for important intellectual content: Bowman, Zimmerman, Christakis, Sharar, Martin.
Statistical analysis: Bowman, Zimmerman, Christakis, Martin.
Obtained funding: Christakis.
Administrative, technical, or material support: Bowman.
Study supervision: Christakis, Martin.
Financial Disclosures: None reported.
Funding/Support: Mr Bowman is partially supported by funds from the Division of State, Community, and Public Health (DSCPH), Bureau of Health Professions (BHPr), Health Resources and Services Administration (HRSA), Department of Health and Human Services (DHHS) under grant 1 D36 HP 10027, entitled “Enhancing Health Care in Western Washington’s Rural Areas” (total award amount $839 724).
Role of the Sponsor: The DHHS had no direct involvement in this analysis or the decision to publish.
Disclaimer: The information or content and conclusions are those of the authors and should not be construed as the official position or policy of, nor should any endorsements be inferred by the DSCPH, BHPr, HRSA, DHHS, or the US government. The Child Health Institute, Children’s Hospital and Regional Medical Center, University of Washington, purchased the KID data set for use in this project.