1. Department of Biostatistics and Epidemiology, School of Public Health and Health Sciences, University of Massachusetts-Amherst, Amherst, Massachusetts, USA
2. Elaine Marieb College of Nursing, University of Massachusetts-Amherst, Amherst, Massachusetts, USA
3. Department of Health Promotion and Policy, School of Public Health and Health Sciences, University of Massachusetts-Amherst, Amherst, Massachusetts, USA