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The minimum principal strain on the middle of the ventral side of each vertebral body from T3 to L3 was plotted on graphs (at the normal spine model including the rib cage, T11-10°, T11-20°, L1-10°, and L1-20° compression fracture model). (a) 0.0025 s. (b) 0.005 s. (c) 0.075 s. (d) 0.01 s.
