1. Department of Laboratory Medicine and Pathology University of Washington Medical Center Seattle Washington USA
2. Departments of Dermatology and Dermatopathology University of Washington Medical Center Seattle Washington USA
3. Departments of Dermatology and Laboratory Medicine and Pathology Mayo Clinic College of Medicine Rochester Minnesota USA
4. Department of Dermatology University of Wisconsin Madison Wisconsin USA
5. Departments of Dermatology and Pathology Cleveland Clinic Cleveland Ohio USA