About the Authors

Joshua S. Yang
Center for Tobacco Control Research and Education, University of California San Francisco, San Francisco, California , United States of America

Thomas E. Novotny
Graduate School of Public Health, San Diego State University, San Diego, California, United States of America

Corresponding Author

tnovotny@mail.sdsu.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

ICMJE criteria for authorship read and met: JSY TEN. Wrote the first draft of the paper: JSY. Contributed to the writing of the paper: JSY TEN. Conceptualized the project and prepared the manuscript: JSY TEN.