Do we need more than one bronchial provocation test in order to diagnose asthma?
This editorial discusses the findings of the paper in this issue by E. Gade et al.  pp. 966-71.
H. O. Koskela, Department of Respiratory Medicine, Kuopio University Hospital, PO Box 1777, 70211 Kuopio, Finland.
No abstract is available for this article.