TY  - RPRT
TI  - Interim analyses with delayed observations in clinical trials.
AU  - S C Choi
AU  - Y J Lee
PY  - 1999
DO  - 10.1002/(sici)1097-0258(19990615)18:11<1297::aid-sim123>3.0.co;2-5
UR  - https://pubmed.ncbi.nlm.nih.gov/10399197/
ID  - 10399197
ER  -