TY  - RPRT
TI  - Conditional and unconditional confidence intervals following a group sequential test.
AU  - Xiaoyin Fan
AU  - David L DeMets
PY  - 2006
DO  - 10.1080/10543400500406595
UR  - https://pubmed.ncbi.nlm.nih.gov/16440840/
ID  - 16440840
ER  -