Nina K Antonov1, Marcus W Bosenberg2,3, Charles L Halasz4. 1. Columbia University College of Physicians and Surgeons, New York, NY, USA. 2. Department of Dermatology, Yale University School of Medicine, New Haven, CT, USA. 3. Department of Pathology, Yale University School of Medicine, New Haven, CT, USA. 4. Department of Dermatology, Columbia University Medical Center, New York, NY, USA.