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The predictive value of the acute effect of montelukast on an exercise challenge test for the outcome of longterm treatment with montelukast

What is the correlation between change in % fall in FEV1 (*FEV1) after an exercise challenge 20h after a single dose of montelukast and after 4 weeks of treatment with montelukast?

The predictive value of the acute effect of beclomethasone on a mannitol challenge test for the outcome of longterm treatment with beclomethasone

What is the correlation between change in Mannitol PD15 (provoking dose of mannitol to cause a >= 15% fall in FEV1 ) 6h after a single dose of beclomethasone and after 4 weeks of treatment with beclomethasone?