title: Contamination in trials: is cluster randomisation the answer?
authors.affiliation: Centre for Health Economics, University of York, York YO10 5DD. djt6@york.ac.uk
authors.forename: D J
authors.initials: DJ
authors.lastname: Torgerson
mesh_terms: D006801:Humans; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012107:Research Design; D018401:Sample Size; D015983:Selection Bias; D013223:Statistics as Topic