1. Department of Dermatology University Hospitals Cleveland Medical Center, Case Western Reserve University Cleveland Ohio USA
2. Department of Dermatology Warren Alpert Medical School, Brown University Providence Rhode Island USA
3. Department of Internal Medicine Vanderbilt University Medical Center Nashville Tennessee USA
4. Department of Dermatology Johns Hopkins University School of Medicine Baltimore Maryland USA
5. Department of Dermatology Brigham and Women's Hospital, Harvard Medical School Boston Massachusetts USA