1 Duke University School of Medicine, Durham, North Carolina, USA.
2 Division of Dermatology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA.
3 Keck School of Medicine, University of Southern California, Los Angeles, California, USA.
4 Kirk Kerkorian School of Medicine, University of Nevada, Las Vegas, Las Vegas, Nevada, USA.
5 School of Medicine, Georgetown University, Washington, District of Columbia, USA.
6 College of Medicine, The University of Arizona, Phoenix, Arizona, USA.
7 Division of Dermatology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA. Electronic address: [email protected].