1. Northwestern University 1 Department of Pathology, Feinberg School of Medicine, , Chicago, IL, USA
2. Northwestern University 2 Department of Dermatology, Feinberg School of Medicine, , Chicago, IL, USA
3. Northwestern University 3 Robert H. Lurie Comprehensive Cancer Center, , Chicago, IL, USA
4. Perelman School of Medicine at the University of Pennsylvania 4 Department of Dermatology, , Philadelphia, PA, USA