TY  - RPRT
TI  - A note on sample size calculation based on propensity analysis in nonrandomized trials.
AU  - Sin-Ho Jung
AU  - Shein-Chung Chow
AU  - Eric M Chi
PY  - 2007
DO  - 10.1080/10543400601044790
UR  - https://pubmed.ncbi.nlm.nih.gov/17219754/
ID  - 17219754
ER  -