TY  - RPRT
TI  - Autonomous influence on sinus node and AV node function in the elderly without significant heart disease: assessment with electrophysiological and autonomic tests.
AU  - H O Vallin
PY  - 1980
DO  - 10.1093/cvr/14.4.206
UR  - https://pubmed.ncbi.nlm.nih.gov/7427968/
ID  - 7427968
ER  -