TY  - RPRT
TI  - Sample size: how many patients are necessary?
AU  - P M Fayers
AU  - D Machin
PY  - 1995
DO  - 10.1038/bjc.1995.268
UR  - https://pubmed.ncbi.nlm.nih.gov/7599035/
ID  - 7599035
ER  -