1. Department of Dermatology; Mayo Clinic; 200 First St SW Rochester MN 55905 U.S.A.
2. Kansas City University of Medicine and Biosciences; Kansas City MO U.S.A.
3. Division of Biomedical Statistics and Informatics; Mayo Clinic; 200 First St SW Rochester MN 55905 U.S.A.
4. Department of Dermatology; Division of Dermatopathology and Cutaneous Immunopathology; Mayo Clinic; 200 First St SW Rochester MN 55905 U.S.A.