ETC	Effort-to-Compress
CCC	Compression-Complexity Causality
$P_C$	Compressive potential
$A_{P_C}$	Compressive potential based temporal asymmetry measure
GC	Granger Causality
TE	Transfer Entropy
CMI	Conditional Mutual Information
CCM	Convergent Cross Mapping
PI	Predictability Index
KLD	Kullback Leibler Divergence
AR	Autoregressive
LGP	Linear Gaussian Process
STAR	Static nonlinear transformation of a first order Gaussian process
SETAR	Self-Exciting Threshold AR
IAAFT	Iterative Amplitude Adjusted Fourier Transform
HP	Heart Period
HPV	Heart Period Variability
HPVA	Heart Period Variability Asymmetry
SAP	Systolic Arterial Pressure