title: Parametric v non-parametric methods for data analysis.
authors.affiliation: Centre for Statistics in Medicine, University of Oxford, Wolfson College Annexe, Oxford OX2 6UD. doug.altman@csm.ox.ac.uk
authors.forename: Douglas G
authors.initials: DG
authors.lastname: Altman
authors.forename: J Martin
authors.initials: JM
authors.lastname: Bland