RT Journal Article SR Electronic T1 James Mackenzie Lecture. JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 498 OP 498 VO 29 IS 205 A1 W. Yellowlees YR 1979 UL http://bjgp.org/content/29/205/498.2.abstract AB