1. Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA;
2. Division of Dermatology, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA;
3. Department of Dermatology and Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL, USA;
4. Medical Dermatology Associates of Chicago, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA