RT Journal Article SR Electronic T1 Duncan MacGillivray Cameron. M.B., Ch.B., F.R.C.G.P JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 857 OP 857 VO 24 IS 149 A1 R. M. Courtenay YR 1974 UL http://bjgp.org/content/24/149/857.2.abstract AB