1. Department of Dermatology University of California San Francisco School of Medicine San Francisco California USA
2. Department of Dermatology Kaiser Permanente Northern California Martinez California USA
3. Dermatology Program, Department of Dermatology, Boston Children's Hospital Harvard Medical School Boston Massachusetts USA
4. Department of Dermatology Yale University School of Medicine New Haven Connecticut USA
5. Department of Dermatology Phoenix Children's Hospital Phoenix Arizona USA
6. Department of Dermatology Oregon Health and Science University Portland Oregon USA
7. Departments of Pathology and Dermatology, UCSF Dermatopathology Service University of California San Francisco School of Medicine San Francisco California USA
8. Department of Dermatology, University Hospitals Cleveland Medical Center Case Western Reserve University School of Medicine Cleveland Ohio USA