TY  - RPRT
TI  - Sinus node recovery time in the elderly.
AU  - H E Kulbertus
AU  - F Leval-Rutten
AU  - L Mary
AU  - P Casters
PY  - 1975
DO  - 10.1136/hrt.37.4.420
UR  - https://pubmed.ncbi.nlm.nih.gov/1125118/
ID  - 1125118
ER  -