1. Department of Health Services Research; The University of Texas MD Anderson Cancer Center; Houston Texas
2. Department of Economics; Rice University; Houston Texas
3. Division of Biostatistics, School of Public Health; The University of Texas Health Science Center at Houston; Houston Texas
4. Division of Epidemiology, School of Public Health; The University of Texas Health Science Center at Houston; Houston Texas
5. Breast Medical Oncology Department; The University of Texas Health Science Center at Houston; Houston Texas