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 772 OP 772 VO 22 IS 124 A1 B. J. Brooks YR 1972 UL http://bjgp.org/content/22/124/772.1.abstract AB