TY  - RPRT
TI  - Estimating vaccine efficacy using auxiliary outcome data and a small validation sample.
AU  - Haitao Chu
AU  - M Elizabeth Halloran
PY  - 2004
DO  - 10.1002/sim.1849
UR  - https://pubmed.ncbi.nlm.nih.gov/15316953/
ID  - 15316953
ER  -