1. University of Texas MD Anderson Cancer Center, Department of Health Services Research, Houston.
2. University of Texas Southwestern Medical Center, Department of Dermatology, Dallas.
3. University of Texas MD Anderson Cancer Center, Department of Dermatology, Houston.
4. University of California Los Angeles Jonsson Comprehensive Cancer Center.
5. University of California Los Angeles, David Geffen School of Medicine, Department of Radiation Oncology.