TY  - RPRT
TI  - Combining 2 x 2 tables that contain structural zeros.
AU  - W D Johnson
AU  - W L May
PY  - 1995
DO  - 10.1002/sim.4780141706
UR  - https://pubmed.ncbi.nlm.nih.gov/8532983/
ID  - 8532983
ER  -