TY  - RPRT
TI  - Invited commentary: propensity scores.
AU  - M M Joffe
AU  - P R Rosenbaum
PY  - 1999
DO  - 10.1093/oxfordjournals.aje.a010011
UR  - https://pubmed.ncbi.nlm.nih.gov/10453808/
ID  - 10453808
ER  -