1. Department of Family and Community Medicine, University of California San Francisco, San Francisco, CA, USA
2. Epidemiology Research Unit, National Institute of Cancer, Mexico City, Mexico
3. Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA
4. Center for Research on Population Health, National Institute of Public Health, Mexico City, Mexico
5. Department of Gynecology, National Institute of Cancer, Mexico City, Mexico
6. Department of Perinatal Health, National Institute of Public Health, Cuernavaca, Mexico
7. Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA, USA