RT Journal Article SR Electronic T1 Trenchard Louis Robert Hall, MRCGP JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 702 OP 703 VO 28 IS 196 A1 John S. Makin YR 1978 UL http://bjgp.org/content/28/196/702.3.abstract AB