1. School of Medicine, University of California, Riverside, Riverside, CA, USA;
2. School of Medicine, Saint Louis University, St. Louis, MO, USA;
3. School of Medicine, Loma Linda University, Loma Linda, CA, USA;
4. Department of Dermatology, University of California, San Francisco, CA, USA;
5. Department of Dermatology, Kaiser Permanente Los Angeles Medical Center, Los Angeles, CA, USA