2D	Two-dimensional
3D	Three-dimensional
EBM	Evidence-based medicine
EEG	Electroencephalogram
HRV	Heart rate variability
IgA	Immunoglobulin A
NK	Natural killer
LF	Low frequency
HF	High frequency
SD	Semantic differential
TRS	Near-infrared time-resolved spectroscopy
VOCs	Volatile organic compounds
VDT	Visual display terminal