TY  - RPRT
TI  - Exercise testing in heart failure: maximal, submaximal, or both?
AU  - Vera Bittner
PY  - 2003
DO  - 10.1016/s0735-1097(03)00501-1
UR  - https://pubmed.ncbi.nlm.nih.gov/12849671/
ID  - 12849671
ER  -