1. Department of Dermatology, Keck School of Medicine, University of Southern California, Los Angeles, California
2. Department of Dermatology, Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain
3. AbbVie, North Chicago, Illinois
4. Analysis Group Inc, Boston, Massachusetts
5. Analysis Group Inc, Los Angeles, California
6. Health Care Research in Dermatology and Nursing, University Medical Center Hamburg-Eppendorf, Hamburg, Germany