1. Department of Epidemiology, UCLA Fielding School of Public Health, P.O. Box 951722, Los Angeles, CA 90095, USA
2. Department of Nutrition and Food Science, California State University, 5151 State University Drive, Los Angeles, CA 90032, USA
3. School of Health Professions, Rutgers Biomedical and Health Sciences, 65 Bergen St., Newark, NJ 07101, USA
4. Department of Family Medicine, David Geffen School of Medicine at UCLA, 10880 Wilshire Blvd, Suite 1800, Los Angeles, CA 90024, USA
5. Population Health Program, UCLA Clinical and Translational Science Institute, 10833 Le Conte Ave., BE-144 CHS, Los Angeles, CA 90095, USA
6. Research Group on Statistics, Econometrics, and Health (GRECS), University of Girona, Carrer de la Universitat de Girona 10, Campus de Montilivi, 17003 Girona, Spain