1. Keck School of Medicine of USC University of Southern California Los Angeles California USA
2. David Geffen School of Medicine University of California Los Angeles Los Angeles California USA
3. University of Arizona College of Medicine Tucson Arizona USA
4. Department of Dermatology University of Southern California Los Angeles California USA
5. Division of Dermatology Children's Hospital Los Angeles Los Angeles California USA
6. Department of Dermatology University of Arkansas for Medical Sciences Little Rock Arkansas USA