1 School of Medicine, Eastern Virginia Medical School, Norfolk, Virginia.
2 College of Osteopathic Medicine, Rocky Vista University, Parker, Colorado.
3 Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, Colorado.
4 Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom.
5 Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, Colorado; Department of Epidemiology, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, Colorado; Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, Colorado. Electronic address: Robert.dellavalle@ucdenver.edu.