TY  - RPRT
TI  - Letter: Ventricular premature contractions and A-V conduction. II.
AU  - H O Klein
PY  - 1975
DO  - 10.1016/0002-9149(75)90069-7
UR  - https://pubmed.ncbi.nlm.nih.gov/47707/
ID  - 47707
ER  -