1. Division of Chronic Disease and Injury Prevention, Los Angeles County Department of Public Health , Los Angeles , California , United States
2. Department of Economics, University of Rovira i Virgili , Reus , Catalonia , Spain
3. Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), Instituto de Salud Carlos III , Madrid , Spain
4. Research Group on Statistics, Econometrics and Health (GRECS), University of Girona , Catalonia , Girona , Spain
5. Department of Family Medicine, David Geffen School of Medicine at University of California , Los Angeles , California , United States
6. Department of Epidemiology, UCLA Fielding School of Public Health, Population Health Program, UCLA Clinical and Translational Science Institute , Los Angeles , California , United States