TY  - RPRT
TI  - Contamination in trials: is cluster randomisation the answer?
AU  - D J Torgerson
PY  - 2001
DO  - 10.1136/bmj.322.7282.355
UR  - https://pubmed.ncbi.nlm.nih.gov/11159665/
ID  - 11159665
ER  -