1 Department of Otolaryngology-Head and Neck Surgery, University of Colorado School of Medicine, Aurora, CO, USA.
2 Department of Pathology, University of Colorado School of Medicine, Aurora, CO, USA; Department of Pediatric Pathology, Children's Hospital Colorado, Aurora, CO, USA.
3 Department of Otolaryngology-Head and Neck Surgery, University of Colorado School of Medicine, Aurora, CO, USA; Department of Pediatric Otolaryngology, Children's Hospital Colorado, Aurora, CO, USA. Electronic address: Kenny.chan@childrenscolorado.org.