Concentrations of urinary LTE4 (a) and plasma histamine (b) in control subjects (Control, ) and patients with bronchial asthma () at a stable condition (Stable), during exacerbations (Exacerbation) and after 21 days of treatment with oral glucocorticoids when patients showed evidence of clinical improvement (Recovery). Mean values ± S.E.M. are indicated by closed circles with error bars. NS, not significant. (Cited from [19]).
