TY  - RPRT
TI  - Sample sizes for prevention trials have been too small.
AU  - F Ederer
AU  - T R Church
AU  - J S Mandel
PY  - 1993
DO  - 10.1093/oxfordjournals.aje.a116739
UR  - https://pubmed.ncbi.nlm.nih.gov/8484370/
ID  - 8484370
ER  -