Summarising data.
Simpson
J A
JA
Department of General Practice and Primary Care, University of Aberdeen, Foresterhill Health Centre, Westburn Rd, Aberdeen, AB25 2AY, UK. j.a.simpson@abdn.ac.uk
Mollison
J
J
Hannaford
P C
PC
D005193:Family Planning Services; D006801:Humans; D016008:Statistical Distributions