About the Authors

Michael J. Harvey

Contributed equally to this work with: Michael J. Harvey, Lisa A. Prosser, Mark L. Messonnier, David W. Hutton

harveymj@umich.edu

Affiliation Department of Health Management and Policy, School of Public Health, University of Michigan, Ann Arbor, Michigan, United States of America

Lisa A. Prosser

Contributed equally to this work with: Michael J. Harvey, Lisa A. Prosser, Mark L. Messonnier, David W. Hutton

Affiliations Department of Health Management and Policy, School of Public Health, University of Michigan, Ann Arbor, Michigan, United States of America, Child Health Evaluation and Research Unit, Division of General Pediatrics, University of Michigan Medical School, Ann Arbor, Michigan, United States of America

Mark L. Messonnier

Contributed equally to this work with: Michael J. Harvey, Lisa A. Prosser, Mark L. Messonnier, David W. Hutton

Affiliation National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

David W. Hutton

Contributed equally to this work with: Michael J. Harvey, Lisa A. Prosser, Mark L. Messonnier, David W. Hutton

Affiliation Department of Health Management and Policy, School of Public Health, University of Michigan, Ann Arbor, Michigan, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MJH LAP MLM DWH. Performed the experiments: MJH. Analyzed the data: MJH DWH. Wrote the paper: MJH LAP MLM DWH.