RT Journal Article SR Electronic T1 "Behaviour determined" demand in an "artifical practice". JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 363 OP 370 VO 15 IS 5 A1 A. Jacob YR 1968 UL http://bjgp.org/content/15/5/363.abstract AB