TY  - RPRT
TI  - Sample sizes for group sequential cohort and case-control study designs.
AU  - B S Pasternack
AU  - R E Shore
PY  - 1981
DO  - 10.1093/oxfordjournals.aje.a113082
UR  - https://pubmed.ncbi.nlm.nih.gov/7468575/
ID  - 7468575
ER  -