TY  - RPRT
TI  - Interim analyses and sequential designs in phase III studies.
AU  - S Todd
AU  - A Whitehead
AU  - N Stallard
AU  - J Whitehead
PY  - 2001
DO  - 10.1046/j.1365-2125.2001.01382.x
UR  - https://pubmed.ncbi.nlm.nih.gov/11421995/
ID  - 11421995
ER  -