[1]Sein?joki Central Hospital Hanneksenrinne 7 60220 Sein?joki Finland;
[2]Department of Medical Microbiology and Immunology Turku University Turku Finland;
[3]Tampere Center forChild Health Research Tampere University andU niversity Hospital Tampere Finland;
[4]Department of Pediatrics and Adolescent Medicine Turku University Hospital and Child and Youth Research Institute University ofT urku Turku Finland;
[5]Department of Medical Microbiology Capital Medical University Beijing China;
Bronchiolitis; IL10 gene polymorphism; Infant; Respiratory syncytial virus;