TY  - RPRT
TI  - Spontaneous echo contrast in mechanical valve prosthesis.
AU  - T O Cheng
PY  - 1997
DO  - 10.1016/s0003-4975(97)83874-x
UR  - https://pubmed.ncbi.nlm.nih.gov/9205206/
ID  - 9205206
ER  -