1. Department of Health Promotion and Policy, University of Massachusetts, Amherst, MA 01003, USA
2. Center for Health Equity Research, Northern Arizona University, Flagstaff, AZ 86011, USA
3. Southwest Interdisciplinary Research Center, Arizona State University, Phoenix, AZ 85004, USA
4. Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, University of Arizona, Tucson, AZ 85724, USA