Correspondence

Plasma theophylline concentrations, six minute walking distances, and breathlessness in patients with chronic airflow obstruction

Br Med J (Clin Res Ed) 1985; 290 doi: https://doi.org/10.1136/bmj.290.6462.159-b (Published 12 January 1985) Cite this as: Br Med J (Clin Res Ed) 1985;290:159

This is a PDF-only article. The first page of the PDF of this article appears below.

PDF extract preview

Sign in

Log in through your institution

Subscribe