TY  - RPRT
TI  - Are distinctive ethical principles required for cluster randomized controlled trials?
AU  - J L Hutton
PY  - 2001
DO  - 10.1002/1097-0258(20010215)20:3<473::aid-sim805>3.0.co;2-d
UR  - https://pubmed.ncbi.nlm.nih.gov/11180314/
ID  - 11180314
ER  -