PPG	Photoplethysmography
RS	Rising Slope
FS	Falling Slope
AVF	Arteriovenous Fistula
DOS	Degree of Stenosis
MLPN	Multilayer Perceptron Neural Network
USRDS	U.S. Renal Data System Annual Data Report
ESRD	End-Stage Renal Disease
TWRDS	Taiwan Renal Registry Data System
HD	Hemodialysis
LPF	Low pass filter
DPMN	Dual PPG measurement node
LMA	Levenberg-Marquardt Algortithm
SCGA	Scaled Conjugate Gradient Algorithm
RPA	Resilient Backpropagation Algorithm
ACC	Accuracy
REC	Recall
SPE	Specificity
PPV	Positive Predictive Value (Precision)
GM	Geometric Mean
TnT	Training Time
TT	Test Time
MSE	Mean Square Error