TY  - RPRT
TI  - Aortic and mitral valve replacement with two different disc prostheses. A randomized and comparative study.
AU  - L Efskind
AU  - S Nitter-Hauge
AU  - K V Hall
AU  - T Froysaker
AU  - O Storstein
PY  - 1973
UR  - https://pubmed.ncbi.nlm.nih.gov/4806879/
ID  - 4806879
ER  -