TY  - RPRT
TI  - Profound first-degree atrioventricular block. A 30-year study.
AU  - H L Greene
AU  - P F Ryan
AU  - V A McKusick
PY  - 1978
DO  - 10.1378/chest.74.2.212
UR  - https://pubmed.ncbi.nlm.nih.gov/679755/
ID  - 679755
ER  -