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Comment
. 1998 Oct 17;317(7165):1078.

Identifying asthma and chronic obstructive pulmonary disease in patients with persistent cough. Why was no control group studied?

J M Rothenberg
Comment

Identifying asthma and chronic obstructive pulmonary disease in patients with persistent cough. Why was no control group studied?

J M Rothenberg. BMJ. .
No abstract available

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Comment on

References

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    1. Thiadens HA, de Bock GH, Dekker FW, Huysman JAN, van Houwelingen JC, Springer MP, et al. Identifying asthma and chronic obstructive pulmonary disease in patients with persistent cough presenting to general practitioners: descriptive study. BMJ. 1998;316:1286–1290. . (25 April.) - PMC - PubMed
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