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Carotid plaque tissue was subjected to 30% stretch at 0.1 mm/s, followed by a sinusoidal waveform (amplitude corresponding to 20% stretch) of 1 Hz and 1.5 Hz frequencies for 2 h. (A) Normalized variation in peak force as a function of time; (B) Residual strain accumulation as a function of cycle number (The function used for logarithmic curve fitting is y = a × ln(x) + b).
