“…In the studies of asthmatic children by Siiverman (38) which we reviewed (4), there was no clear correlation between the severity of EIA and the severity of the asthma as judged by recent symptoms, asthma diary scores or home recording of PEFR over the preceding month. Moreover, Silverman et al, (41) found no improvement in EIA in a group of asthmatic children under treatment which considerably improved their clinical and physiological condition. On the other hand, Haynes et al (25) noticed a greater degree of abnormality in several tests of lung function after exercise in adults with more abnormal resting values, but commented, that because of the variance, it would be difficult to predict the behaviour of a given individual, EIA seemed at first to be an ideal model for studying the action of drugs used to treat asthma, since many of them can be shown to block EIA quite effectively {Fig, 6).…”