1. Department of Emergency Medicine, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, North Carolina, USA.
2. Department of Environmental Sciences, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
3. Department of Population Health Sciences, Duke University, Durham, North Carolina, USA.
4. Department of Health Sciences, Northern Arizona University, Flagstaff, Arizona, USA.
5. Department of Psychiatric Nursing, Indiana University School of Nursing, Indianapolis, Indiana, USA.