RT Journal Article SR Electronic T1 HOW MANY PATIENTS? JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 379 OP 380 VO 27 IS 179 A1 D. G. Bain YR 1977 UL http://bjgp.org/content/27/179/379.2.abstract AB