TY  - RPRT
TI  - Analytic methods for two-stage case-control studies and other stratified designs.
AU  - W D Flanders
AU  - S Greenland
PY  - 1991
DO  - 10.1002/sim.4780100509
UR  - https://pubmed.ncbi.nlm.nih.gov/2068427/
ID  - 2068427
ER  -