TY  - RPRT
TI  - Risk stratification for open heart surgery.
AU  - A Allan
AU  - A T Forsyth
PY  - 1992
DO  - 10.1136/bmj.305.6867.1500-c
UR  - https://pubmed.ncbi.nlm.nih.gov/1493413/
ID  - 1493413
ER  -