RT Journal Article SR Electronic T1 NUMBER 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 631 OP 631 VO 28 IS 195 A1 David Hogg YR 1978 UL http://bjgp.org/content/28/195/631.3.abstract AB