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Stretch corresponding to 25 kPa, λ25 (A) and 50 kPa, λ50 equibiaxial stress levels (B) in the circumferential (red) and longitudinal (blue) directions. (C) TA anisotropy at 25 kPa, A25 (red) and 50 kPa, A50 (blue) equibiaxial stress levels.