1 College of Osteopathic Medicine, Rocky Vista University, Parker, Colorado.
2 Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, Colorado.
3 Division of Dermatology, Lehigh Valley Health Network, Allentown, Pennsylvania.
4 Department of Medicine, University of California, San Diego Campus, San Diego, California.
5 Department of Dermatology, Duke University Hospital, Durham, North Carolina.
6 Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, Colorado; Department of Epidemiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado; Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, Colorado. Electronic address: Robert.dellavalle@ucdenver.edu.