About the Authors
- Matthew C. Farrelly
* E-mail: email@example.com
Affiliation Research Triangle Institute (RTI) International, Research Triangle Park, North Carolina, United States of America
- James M. Nonnemaker
- Kimberly A. Watson
The authors have declared that no competing interests exist.
Analyzed the data: KAW. Wrote the paper: MCF JMN KAW.