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Prognostic factors of asthma severity: a 9-year international prospective cohort study

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General Info
Geography 
Australia (AUS)
Belgium (BEL)
Estonia (EST)
France (FRA)
Germany (DEU)
Iceland (ISL)
Italy (ITA)
Norway (NOR)
Spain (ESP)
Sweden (SWE)
Time period covered 
01/1992 - 12/2002
Keywords