1. Keck School of Medicine of the University of Southern California, Los Angeles, California, USA.
2. Kirk Kerkorian School of Medicine at UNLV, Las Vegas, Nevada, USA.
3. Duke University School of Medicine, Durham, North Carolina, USA.
4. Georgetown University School of Medicine, Washington, District of Columbia, USA.
5. University of Arizona College of Medicine, Phoenix, Arizona, USA.
6. Division of Dermatology, Department of Medicine, David Geffen School of Medicine at the University of California, Los Angeles, California, USA.
7. Department of Dermatology, Keck School of Medicine of the University of Southern California, Los Angeles, California, USA.