TY  - RPRT
TI  - Using group-sequential analysis to achieve the optimal sample size.
AU  - Michael S Rogers
AU  - Allan M Z Chang
AU  - Susan Todd
PY  - 2005
DO  - 10.1111/j.1471-0528.2005.00479.x
UR  - https://pubmed.ncbi.nlm.nih.gov/15842273/
ID  - 15842273
ER  -