1. Institute for Social and Economic Research University of Essex; Colchester UK
2. School of Public Health; The University of Texas Health Sciences Center; Houston TX USA
3. Department of Family and Community Medicine; Texas Tech University Health Sciences Center; El Paso TX USA
4. Department of Health Services Research; The University of Texas MD Anderson Cancer Center; Houston TX USA
5. Graduate College of Social Work; University of Houston; Houston TX USA
6. Department of Urology; The University of Texas MD Anderson Cancer Center; Houston TX USA
7. Department of General Internal Medicine; The University of Texas MD Anderson Cancer Center; Houston TX USA