RT Journal Article SR Electronic T1 Double-blind trial of a combination of chlordiazepoxide, ephedrine and theophylline (brontrium) in bronchospasm. JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 371 OP 375 VO 20 IS 101 A1 B. D. Lascelles YR 1970 UL http://bjgp.org/content/20/101/371.abstract AB