TABLE I.

3D collagen-only stiffness controls and collagen + GAG hydrogels and their corresponding Young's modulus.²¹

Sample	Young's modulus (kPa)
1.5 mg/ml collagen-only control	2.45 ± 0.45
1.5 mg/ml collagen + 1 mg/ml CS	4.99 ± 1.57
1.5 mg/ml collagen + 1 mg/ml HA	4.48 ± 0.97
2 mg/ml collagen-only control	7.44 ± 0.86
1.5 mg/ml collagen + 10 mg/ml CS	13.08 ± 1.55
1.5 mg/ml collagen + 10 mg/ml HA	13.04 ± 1.69
2.2 mg/ml collagen-only control	37.28 ± 5.12
1.5 mg/ml collagen + 20 mg/ml CS	21.57 ± 1.34
1.5 mg/ml collagen + 20 mg/ml HA	34.01 ± 1.88