TY  - RPRT
TI  - Power and sample size calculations. A review and computer program.
AU  - W D Dupont
AU  - W D Plummer
PY  - 1990
DO  - 10.1016/0197-2456(90)90005-m
UR  - https://pubmed.ncbi.nlm.nih.gov/2161310/
ID  - 2161310
ER  -