About the Authors
- Su-Ting T Li
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*To whom correspondence should be addressed. E-mail: su-ting.li@ucdmc.ucdavis.edu
Affiliation Department of Pediatrics, University of California Davis, Sacramento, California, United States of America
- David C Grossman
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Affiliations Department of Preventive Care, Group Health Cooperative, Seattle, Washington, United States of America , Center for Health Studies, Group Health Cooperative, Seattle, Washington, United States of America , Department of Health Services, University of Washington, Seattle, Washington, United States of America , Department of Pediatrics, University of Washington, Seattle, Washington, United States of America
- Peter Cummings
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Affiliation Department of Epidemiology, University of Washington, Seattle, Washington, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
STL and DCG designed the study and analyzed the data. STL, DCG, and PC contributed to writing the paper.