RT Journal Article SR Electronic T1 TWO COPIES OF THE JOURNAL JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 910 OP 910 VO 23 IS 137 A1 Norman F. Leigh YR 1973 UL http://bjgp.org/content/23/137/910.1.abstract AB