TY  - RPRT
TI  - Contrast echocardiography. Introduction.
AU  - M A García-Fernández
PY  - 2004
DO  - 10.1016/s1525-2167(04)80001-5
UR  - https://pubmed.ncbi.nlm.nih.gov/15698554/
ID  - 15698554
ER  -