RubikB. Effects of a passive online software application on heart rate variability and autonomic nervous system balance. J Altern Complement Med, 2017; 23:68–74.
2.
BillmanGE. The LF/HF ratio does not accurately measure cardiac sympatho-vagal balance. Front Physiol, 2013; 4:26.
3.
VauxDL, FidlerF, CummingG. Replicates and repeats—What is the difference and is it significant? A brief discussion of statistics and experimental design. EMBO Rep, 2012; 13:291–296.
