TY  - RPRT
TI  - Methodological issues in cohort studies. II: Power calculations.
AU  - G R Howe
AU  - A M Chiarelli
PY  - 1988
DO  - 10.1093/ije/17.2.464
UR  - https://pubmed.ncbi.nlm.nih.gov/3403142/
ID  - 3403142
ER  -