1. Division of Dermatology, Dell Medical School, University of Texas, Austin, Texas;
2. Ironwood Dermatology and Aesthetic Services, Tucson, Arizona;
3. Baylor Scott & White Dermatology, Marble Falls, Texas;
4. Dermatology Associates, Tigard, Oregon;
5. Biostatistics Shared Research, Knight Cancer Institute, Oregon Health and Science University, Portland, Oregon;
6. Department of Dermatology, Oregon Health & Science University, Portland, Oregon