1. Cutaneous Hematopathology Clinic, Department of Dermatology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico
2. Department of Dermatology, California Pacific Medical Center, San Francisco
3. Dermatopathology Service, Departments of Pathology and Dermatology, University of California, San Francisco
4. University of California, San Francisco Helen A. Diller Family Comprehensive Cancer Center
5. Department of Epidemiology and Biostatistics, University of California, San Francisco
6. Division of Hematology and Oncology, Department of Medicine, University of California, San Francisco