RT Journal Article SR Electronic T1 1980 YEARBOOK OF MEDICINE JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 252 OP 252 VO 31 IS 225 A1 B. Bedford YR 1981 UL http://bjgp.org/content/31/225/252.4.abstract AB