About the Authors

Earl S. Ford

eford@cdc.gov

Affiliation Division of Adult and Community Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

David M. Mannino

Affiliation Department of Preventive Medicine and Environmental Health, University of Kentucky College of Public Health, Lexington, Kentucky, United States of America

Anne G. Wheaton

Affiliation Division of Adult and Community Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Letitia Presley-Cantrell

Affiliation Division of Adult and Community Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Yong Liu

Affiliation Division of Adult and Community Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Wayne H. Giles

Affiliation Division of Adult and Community Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Janet B. Croft

Affiliation Division of Adult and Community Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Competing Interests

Dr Mannino has the following potential conflicts of interest and financial disclosures to declare: Received honoraria/consulting fees and served on speaker bureaus for GlaxoSmithKline plc, Novartis Pharmaceuticals, Pfizer Inc., AstraZeneca PLC, Forest Laboratories Inc., and Creative Educational Concepts. Furthermore, he has received royalties from Up-to-Date. The remaining authors have declared that no competing interests exist. This does not alter our adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: EF. Analyzed the data: EF AW. Wrote the paper: EF DM AW LP YL WG JB.