1. University of Arizona, Mel & Enid Zuckerman College of Public Health; Division of Health Promotion Sciences; 1295 N. Martin Avenue A256 Campus POB: 245163 Tucson Arizona USA AZ 85724
2. The University of Alabama; School of Social Work; PO Box 870314 Tuscaloosa AL USA 35487-0314
3. Hode Internal Medicine; 120 South Park Drive, Suite F Brownwood Texas USA 76801
4. University of the West of England at Bristol; Centre for Child and Adolescent Health; Hampton House Cotham Hill Bristol UK BS6 6JS