1. Department of Otolaryngology, Head and Neck Surgery, Stanford University, 801 Welch Road, Stanford, CA 94305-5739, USA
2. Department of Pathology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, China
3. Department of Otolaryngology-Head and Neck Surgery, the First Affiliated Hospital, Zhengzhou University, Zhengzhou 450000, China
4. The Protein and Nucleic Acid Biotechnology Facility, Beckman Center Stanford University, 279 Campus Drive, West Stanford, CA 94305, USA