1. Dermatology Professionals, Inc., East Greenwich, Rhode Island
2. Division of Dermatology, University of Vermont Medical Center, Burlington, Vermont
3. Department of Dermatology, Oregon Health & Science University, Portland, Oregon
4. Department of Dermatology, Brugmann - St Pierre - HUDERF University Hospitals, Université Libre de Bruxelles, Brussels, Belgium;
5. Department of Dermatology, University of Massachusetts Medical School, Worcester, Massachusetts
6. Department of Dermatology, The Warren Alpert Medical School at Brown University, Providence, Rhode Island