Matching or selection bias in the fenoterol studies?
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S F
SF
D001249:Asthma / Q000188:drug therapy* / Q000401:mortality*; D016022:Case-Control Studies; D015986:Confounding Factors, Epidemiologic; D005280:Fenoterol / Q000009:adverse effects*; D006801:Humans; D009520:New Zealand / Q000453:epidemiology; D015983:Selection Bias
D005280:Fenoterol