1. Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
2. Department of Radiation Oncology, MidCentral District Health Board, Palmerston North, New Zealand
3. Department of Oncology, Cancer Diseases Hospital, Lusaka, Zambia
4. University of Texas Health Science Center School of Public Health, Houston, TX
5. Department of Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX
6. Department of Behavioral Science, The University of Texas MD Anderson Cancer Center, Houston, TX
7. Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX