| acute lower respiratory infections in hospitalized children over a 6 year period in tokyo. | acute lower respiratory infections are major causes of hospitalization in children and are mainly caused by respiratory viruses. in the present study, we investigated the etiologic agents responsible for acute lower respiratory infections from the period november 1986 to october 1992 in order to determine the seasonal pattern and different characteristics of age distribution of respiratory infectious agents, mainly virus infections. | 1999 | 10530065 |