4Ukkonen P, Hovi T, von Bonsdorff CH, et al. Age specific prevalence of complement fixing antibodies to sixteen viral antigens: a computer analysis of 58 500 patients covering a period of 8 years. J Med Virol,1984,13 :131 - 148.
5Hall CB, Walsh EE, Schnabel KC, et al. Occurrence of groups A and B of respiratory syncytial virus over 15 years: associated epidemiologic and clinical characteristics in hospitalized and ambulatory children . J Infect Dis, 1990, 162:1283 - 1290.
6Papadopoulos NG, Sanderson G, Hunter J, et al. Rhinoviruses replicate effectively at lower airway temperatures . J Med Virol, 1999,58:100 - 104.
7Juven T, Mertsola J, Wafts M, et al. Etiology of communityacquired pneumonia in 254 hospitalized children . Pediatr Infect Dis J,2000, 19:293 - 298.
8Kim JO, Hodinka RL. Serious respiratory illness associated with rhinovirus infection in a pediatric population . Clin Diagn Virol, 1998,10:57 - 65.
9Monto AS. The seasonality of rhinovirus infections and its implications for clinical recognition . Clin Ther,2002,24:1987 - 1997.
