About the Authors
- Ying Zhang, Michael A. Stoto
- Department of Health Systems Administration, Georgetown University, Washington, District of Columbia, United States of America
- Hugo Lopez-Gatell, Celia M. Alpuche-Aranda
- National Institute of Public Health, Cuernavaca, Mexico
The authors declare that they have no competing interests.
Conceived and designed the experiments: MAS YZ. Performed the experiments: MAS YZ. Analyzed the data: MAS YZ. Contributed reagents/materials/analysis tools: MAS YZ HLG CAA. Wrote the paper: MAS YZ HLG.