TY  - RPRT
TI  - Mitral valvotomy: closed or open?
AU  - J Hayward
PY  - 1967
DO  - 10.1111/j.1445-2197.1967.tb05535.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5229778/
ID  - 5229778
ER  -