[The SAPALDIA Study--no results?].
Künzli
N
N
D000328:Adult; D000397:Air Pollution / Q000009:adverse effects / Q000706:statistics & numerical data*; D001249:Asthma / Q000453:epidemiology*; D015982:Bias; D003430:Cross-Sectional Studies; D006801:Humans; D012107:Research Design; D013557:Switzerland / Q000453:epidemiology