1. Otorhinolaryngology Hospital; The First Affiliated Hospital; Sun Yat-sen University; Guangzhou China
2. Department of Respiratory; The First Affiliated Hospital; Sun Yat-sen University; Guangzhou China
3. Department of Emergency; Guangdong General Hospital; Guangdong Academy of Medical Science; Guangzhou China
4. Department of Clinical Immunology; The Third Affiliated Hospital; Sun Yat-sen University; Guangzhou China
5. Milton S. Hershey Medical Centre; Penn State University; Hershey PA USA