Nomenclature		GLA	Glutaraldehyde.
3D	Three-dimensional.	LCST	Lower critical solution temperature.
3DP	Three-dimensional printing.	MIS	Minimally invasive surgery.
4D	Four-dimensional.	MW	Molecular weight.
4DP	Four-dimensional printing.	OD	Optical density.
BAU	Biocompatible auxiliary unit.	PVA	Polyvinyl alcohol.
CBH	Chitosan-based hydrogel.	miRNA	Micro Ribonucleic acid.
DD	Degree of deacetylation.	SEM	Scanning electron microscopy.
DDS	Drug delivery system.	TEM	Transmission electron microscopy.
DNA	Deoxyribonucleic acid.	TFNA	Tetrahedral framework nucleic acid.
ECM	Extracellular matrix.	TGA	Thermogravimetry analysis.
FTIR	Fourier transform infrared spectroscopy.	UCST	Lower critical solution temperature.