1. Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ 85721, USA
2. Rural Health Office, University of Arizona, Tucson, AZ 85721, USA
3. Department of Public Health Practice and Translational Research, Mel and Enid Zuckerman College of Public Health, University of Arizona, Phoenix, AZ 85004, USA
4. Division of Health Promotion and Behavioral Science, San Diego State University, San Diego, CA 92182, USA