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. 2014 Apr 18;9(4):e95426. doi: 10.1371/journal.pone.0095426

Figure 4. Range of lumbar (a/b) and thoracic (c/d) curvature angle of the subjects, calculated using the vertebral bodies (black) and the skin markers (hatched).

Figure 4

The range was defined from the upright to the flexed (a/c) and to the extended positions (c/d).