![](/img/cover-not-exists.png)
Difficult Asthma [with Reply]
A. Gorchein, P. J. Barnes, K. F. Chung, Ronald Finn and George HearnVolume:
299
Language:
english
Journal:
BMJ: British Medical Journal
DOI:
10.2307/29705752
Date:
October, 1989
File:
PDF, 625 KB
english, 1989