3Abed Y, Boivin G. Treatment of respiratory virus infections [ J ]. Antiv Res,2006,70(2 ) :1 -16:
4Osterhaus AD. New respiratory viruses of humans [ J ]. Pediatr Infect Dis J,2008,27(10) :S71 -74.
5Abed Y, Boivin G. New Safford cardioviruses in 3 children, Canada [J]. Emerg Infect Dis,2008,14 (5) :834 -836.
6Kliegman RH, Behrman RE, Jenson HB, et al. Nelson textbook of pediatrics [ M ]. 18th. Philadelphia: Saunders, 2007 : 1773 - 1776
7Brittain-Long R, Nord S, Olofsson S, et al. Multiplex real-time PCR for detection of respiratory tract infections [ J]. J Clin Virol, 2008,41 ( I ) :53 - 56.
8Mizuta K, Abiko C, Aoki Y, et al. Analysis of monthly isolation of respiratory viruses from children by cell culture using a microplate method: a two-year study from 2004 to 2005 in Yamagata, Japan [ J ]. Jpn J Infect Dis,2008,61 ( 3 ) : 196 - 201.
9Regamev N, Kaiser L, Roiha HL, et al. Viral etiology of acute respiratory infections with cough in infancy: a community-based birth cohort study [ J ]. Pediatr Infect Dis J, 2008,27 ( 2 ) : 100 - 105.
4[1]Maclure M.The case-crossover design:a method for studying transient effects on the risk ofacuts[J].Am J Epidemiol,1991,133:144-153.
5[2]Navidi W.Bidirectional case crossover design for exposures with time trends[J].Biometrices,1998,54:596-605.
6[4]Ostro BD,Eskeland GS,Sanchez JM,et al.Air pollution and health effects:a study of medical visits among children in Santiago,Chile[J].Environ Health Perspect,1999,107:69-73.
7[5]Boezen HM,Van der Zee SC,Postma DS,et al.Effects of ambient air pollution on upper and lower respiratory symptoms and peak expiratory flow in children[J].Lancet,1999,5353:874-878.
8[6]Jedryehowski W,Flak E,Mraz E.Occuerence of allergy in school-age children and their parents in relation to atmospheric air pollution:prospective study in Cracow[J].Przegl Lek,1998,55:437-441.
9Lepeule J, Rondeau V, Filleul L, et al. Survival analysis to estimate association between short-term mortality and air pollution [J]. Environ Health Perspeet, 2006, 114: 242-247.
10Sorensen M, Loft S, Andersen HV, et al. Personal exposure to PM2.5,black smoke and NO2 in Copenhagen: relationship to bedroom and outdoor concentrations coveting seasonal variation [J]. J Expo Anal Environ Epidemiol, 2005, 15: 413-422.
