6Pin I, Gibson PG, Kolendowicz R, et al. Use of induced sputum cell counts to investigate airway inflammation in asthma. Thorax,1992,447(1):9-25.
7Sigurs N. A cohort of children hospitalised with acute RSV bronchiolitis:impact on later respiratoey diease. Paediatr Respir Rev,2002,3(3):177-183.
8Sigurs N, Bjarnason R, Sigurbergsson F, et al. Respiratory syncytial virus bronchiolitis in infancy is an important risk fator for asthma and allergy at age 7. Am JRespir Crit Care Med, 2000,161(5): 1501 - 1507.
