1. Department of Dermatology; Boston University School of Medicine; 609 Albany Street Boston MA 02118 U.S.A
2. Department of Biostatistics; Levin Cancer Institute; Charlotte NC U.S.A
3. Dermatopathology Section; Boston University School of Medicine; 609 Albany Street Boston MA 02118 U.S.A
4. Advocate Christ Medical Center and Cancer Institute; Oak Lawn IL U.S.A