title: Randomization for concealment.
authors.affiliation: Nuffield College New Road, Oxford OX1 1NF, UK. david.cox@nuffield.ox.ac.uk
authors.forename: David R
authors.initials: DR
authors.lastname: Cox
mesh_terms: D015982:Bias; D016032:Randomized Controlled Trials as Topic / Q000592:standards* / Q000706:statistics & numerical data*