TY  - RPRT
TI  - Heart rate variability.
AU  - Kenneth C Bilchick
AU  - Ronald D Berger
PY  - 2006
DO  - 10.1111/j.1540-8167.2006.00501.x
UR  - https://pubmed.ncbi.nlm.nih.gov/16836727/
ID  - 16836727
ER  -