TY  - RPRT
TI  - Interaction revisited: the difference between two estimates.
AU  - Douglas G Altman
AU  - J Martin Bland
PY  - 2003
DO  - 10.1136/bmj.326.7382.219
UR  - https://pubmed.ncbi.nlm.nih.gov/12543843/
ID  - 12543843
ER  -