TY  - RPRT
TI  - A comparison of two methods for calculating expected mortality.
AU  - A J Hartz
AU  - E E Giefer
AU  - R G Hoffmann
DO  - 10.1002/sim.4780020310
UR  - https://pubmed.ncbi.nlm.nih.gov/6648151/
ID  - 6648151
ER  -