E-cigarettes, Cigarettes, and the Prevalence of Adolescent Tobacco Use

Dr Barrington-Trimis formulated the research question, interpreted the results, wrote and edited the manuscript, and is guarantor of the article; Dr Urman contributed to formulating the research question, conducted the analyses, interpreted the results, and edited the manuscript; Dr Berhane contributed to formulating the research question, interpretation of the results, statistical analyses, and editing the manuscript; Mr Howland developed the questionnaire, collected data, and contributed to the draft of the manuscript; Drs Cruz, Unger, Leventhal, Gilreath, and Samet contributed to formulating the research question, interpretation of results and editing the manuscript; Dr McConnell designed the study, collected data, and contributed to formulating the research question and interpretation of the results and critically reviewed the manuscript; and all authors approved the manuscript as submitted.