1. Department of Otolaryngology-Head and Neck Surgery, Nanfang Hospital; Southern Medical University; Guangzhou China
2. Department of Gastroenterology, Nanfang Hospital; Southern Medical University; Guangzhou China
3. Institute of Molecular Biology; Southern Medical University; Guangzhou China
4. Stanley Ho Center for Emerging Infectious Diseases, Faculty of Medicine; The Chinese University of Hong Kong; Hong Kong China
5. Department of Otolaryngology-Head and Neck Surgery, School of Medicine; Stanford University; Palo Alto California