1 Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, 3400 Civic Center Boulevard, South Tower, 7th floor, Philadelphia, PA, 19104, USA. ronald.berna@Pennmedicine.upenn.edu.
2 Pennsylvania College of Osteopathic Medicine, Philadelphia, PA, USA.
3 Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, 3400 Civic Center Boulevard, South Tower, 7th floor, Philadelphia, PA, 19104, USA.