A cheap telemetric device, the 'Sport-tester', has been shown to be useful in monitoring the free running test for bronchoconstriction.
CITATION STYLE
Tsanakas, J. N., Bannister, O. M., Boon, A. W., & Milner, R. D. G. (1986). The “Sport-tester”: A device for monitoring the free running test. Archives of Disease in Childhood, 61(9), 912–914. https://doi.org/10.1136/adc.61.9.912
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