1. Department of Allergy, The Affiliated Hospital of Qingdao University, Qingdao, China
2. Department of Pediatrics, The Affiliated Hospital of Qingdao University, Qingdao, China
3. Department of Child Health Care, The Affiliated Hospital of Qingdao University, Qingdao, China
4. Department of Clinical Psychology, The Affiliated Hospital of Qingdao University, Qingdao, China
5. Department of Otorhinolaryngology, The Affiliated Hospital of Qingdao University, Qingdao, China.