1. Departments of Dermatology and Pathology; The University of Alabama at Birmingham; Birmingham; AL; U.S.A
2. University of Texas School of Medicine; Houston; TX; U.S.A
3. Departments of Biostatistics; The University of Texas MD Anderson Cancer Center; Houston; TX; U.S.A
4. Dermatology; The University of Texas MD Anderson Cancer Center; Houston; TX; U.S.A