About the Authors

Amanda L. Graham

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Writing – original draft, Writing – review & editing

agraham@truthinitiative.org

Affiliations Schroeder Institute for Tobacco Research and Policy Studies, Truth Initiative, Washington, District of Columbia, United States of America, Department of Oncology, Georgetown University Medical Center / Cancer Prevention and Control Program, Lombardi Comprehensive Cancer Center, Washington, District of Columbia, United States of America

Kang Zhao

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Visualization, Writing – original draft, Writing – review & editing

Affiliation Tippie College of Business, The University of Iowa, Iowa City, Iowa, United States of America

George D. Papandonatos

Roles Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Writing – original draft, Writing – review & editing

Affiliation Center for Statistical Sciences, Brown University, Providence, Rhode Island, United States of America

Bahar Erar

Roles Data curation, Formal analysis, Investigation, Methodology

Affiliation Center for Statistical Sciences, Brown University, Providence, Rhode Island, United States of America

Xi Wang

Roles Formal analysis, Investigation, Methodology, Visualization, Writing – original draft, Writing – review & editing

Affiliation Tippie College of Business, The University of Iowa, Iowa City, Iowa, United States of America

Michael S. Amato

Roles Investigation, Methodology, Writing – original draft, Writing – review & editing

Affiliation Schroeder Institute for Tobacco Research and Policy Studies, Truth Initiative, Washington, District of Columbia, United States of America

Sarah Cha

Roles Investigation, Methodology, Project administration, Writing – original draft, Writing – review & editing

Affiliation Schroeder Institute for Tobacco Research and Policy Studies, Truth Initiative, Washington, District of Columbia, United States of America

Amy M. Cohn

Roles Funding acquisition, Investigation, Methodology, Writing – original draft, Writing – review & editing

Affiliations Schroeder Institute for Tobacco Research and Policy Studies, Truth Initiative, Washington, District of Columbia, United States of America, Department of Oncology, Georgetown University Medical Center / Cancer Prevention and Control Program, Lombardi Comprehensive Cancer Center, Washington, District of Columbia, United States of America

Jennifer L. Pearson

Roles Investigation, Methodology, Writing – original draft, Writing – review & editing

Affiliations Schroeder Institute for Tobacco Research and Policy Studies, Truth Initiative, Washington, District of Columbia, United States of America, Department of Health, Behavior and Society, The Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America

Competing Interests

The authors have read the journal's policy and have the following competing interests: ALG, SC, MSA, AMC, and JLP are employed by Truth Initiative which runs the BecomeAnEX website. This does not alter our adherence to PLOS ONE policies on sharing data and materials. Given the nature of our dataset from an online social network and potential risks of identifying individual members of the network, data are available only upon request from the corresponding author for researchers who meet the criteria for access to confidential data.