1. Department of Health Promotion Sciences, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, Arizona, USA.
2. University of Arizona Health Sciences Library, University of Arizona, Tucson, Arizona, USA.
3. Department of Biobehavioral Sciences, College of Nursing, University of Arizona, Tucson, Arizona, USA.
4. Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, Arizona, USA.