1. Department of PathologyUniversity of California DavisSacramentoCalifornia
2. Department of PathologyUniversity of PittsburghPittsburghPennsylvania
3. Department of Otolaryngology‐Head and Neck SurgeryUniversity of California DavisSacramentoCalifornia
4. Department of Otolaryngology‐Head and Neck SurgeryUniversity of PittsburghPittsburghPennsylvania