RT Journal Article SR Electronic T1 14/15 PRINCES GATE JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 568 OP 569 VO 29 IS 206 A1 Sheldon, M. G. YR 1979 UL http://bjgp.org/content/29/206/568.4.abstract AB