1 Department of Dermatology, University of Colorado School of Medicine, Aurora, Colorado.
2 College of Osteopathic Medicine, Rocky Vista University, Parker, Colorado.
3 Department of Medicine, Saint Joseph's Hospital, Denver, Colorado.
4 Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, Colorado.
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; Dermatology Service, US Department of Veterans Affairs Rocky Mountain Regional Medical Center, Aurora, Colorado. Electronic address: robert.dellavalle@cuanschutz.edu.