1. Department of Epidemiology and Biostatistics, University of Texas Health San Antonio-Laredo Campus, Mays Cancer Center at UT Health San Antonio MD Anderson, Laredo, Texas, USA;
2. Department of Epidemiology, University of Texas Health Science Center-Houston, School of Public Health, Brownsville, Texas, USA;
3. Department of Health Promotion and Health Behavior, University of Texas Health Science Center-Houston, School of Public Health, Brownsville, Texas, USA;
4. Department of Epidemiology, Human Genetics and Environmental Sciences, University of Texas Health Science Center-Houston, School of Public Health, Brownsville, Texas, USA