1. Department of Dermatology, Oregon Health & Science University, Portland, OR, USA
2. Department of Dermatology, University of California, San Francisco, CA, USA
3. Cancer Early Detection Advanced Research Center (CEDAR), Portland, OR, USA
4. Knight Cancer Institute, Oregon Health and Science University, Portland, OR, USA
5. Operative Care Division, U.S. Department of Veterans Affairs Portland Health Care System, Portland, OR, USA