RT Journal Article SR Electronic T1 Letters JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 213 OP 213 VO 39 IS 322 A1 Christopher H. Maycock A1 Charles P. Kent A1 Janet S. Shorney A1 David J. Russell YR 1989 UL http://bjgp.org/content/39/322/213.2.abstract AB