RT Journal Article SR Electronic T1 STATISTICS IN PRACTICE JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 305 OP 306 VO 33 IS 250 A1 N. I. H. Bradley YR 1983 UL http://bjgp.org/content/33/250/305.3.abstract AB