1. Department of Rhinology, the ENT Hospital First Affiliated Hospital of Zhengzhou University Zhengzhou China
2. Department of Pathology Affiliated Hospital of Zhengzhou University Zhengzhou China
3. Department of Pathology, Immunology, and Laboratory Medicine University of Florida College of Medicine Gainesville Florida U.S.A.
4. Department of Pathology and Laboratory Medicine, Kaiser Permanente, Permanente Medicine KP Sacramento Medical Center Sacramento California U.S.A.