TY  - RPRT
TI  - Graded exercise testing and postthoracotomy complications.
AU  - P G Boysen
AU  - C A Clark
AU  - A J Block
PY  - 1990
DO  - 10.1016/0888-6296(90)90449-p
UR  - https://pubmed.ncbi.nlm.nih.gov/2131859/
ID  - 2131859
ER  -