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Obesity and nocturnal gastro-oesophageal reflux are related to onset of asthma and respiratory symptoms

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General Info
Geography 
Denmark (DNK)
Midtjylland
Estonia (EST)
Tartumaa
Iceland (ISL)
Norway (NOR)
Vestlandet
Sweden (SWE)
Västerbotten, Västra Götaland
Time period covered 
01/1990 - 12/2001