Additional file 4.

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Video clip of cumulative lateral shear strain map during one flexion cycle of the table. Red indicates shear strain toward the right (rostral) and blue indicates shear strain toward the left (caudal) (see color scales in Figure 5).

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Langevin et al. BMC Musculoskeletal Disorders 2011 12:203   doi:10.1186/1471-2474-12-203