title: Etiological and clinical investigation of bronchiolitis.
mesh_terms: D001990:Bronchiolitis, Viral / Q000382:microbiology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012136:Respiratory Syncytial Viruses / Q000302:isolation & purification*; D010253:Respirovirus Infections / Q000382:microbiology*