1. Department of Otorhinolaryngology The First Affiliated Hospital Sun Yat‐sen University Guangzhou China
2. Department of Dermatology The First Affiliated Hospital Sun Yat‐sen University Guangzhou China
3. Department of Pediatrics and Microbiology‐Immunology Georgetown University Medical Center Washington DC USA
4. Department of Internal Medicine Ohio State University College of Medicine and Wexner Medical Centre Columbus OH USA