1 Department of Dermatology, University of Colorado, Aurora, Colorado.
2 Children's Hospital Colorado, Aurora, Colorado.
3 Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado, Anschutz Medical Campus, Aurora, Colorado.
4 Division of Dermatology, Department of Pediatrics, University of Washington School of Medicine and Seattle Children's Hospital, Seattle, Washington.
5 Division of Dermatology, Department of Pediatrics, Nationwide Children's Hospital, The Ohio State University College of Medicine, Columbus, Ohio.
6 Department of Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois; Department of Dermatology, Ann and Robert H Lurie Children's Hospital, Chicago, Illinois.
7 Department of Dermatology, and by courtesy, Pediatrics, Stanford University School of Medicine, Palo Alto, California.
8 Division of Dermatology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri.
9 Division of Dermatology, Department of Pediatrics, Nemours Children's Health System, Wilmington, Delaware.
10 Departments of Pediatrics and Dermatology, Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania.
11 Department of Dermatology, University of Colorado, Aurora, Colorado; Centers for American Indian and Alaska Native Health, Colorado School of Public Health, Aurora, Colorado. Electronic address: lucinda.kohn@cuanschutz.edu.