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Boxplots of differences of linear (a) and rotational (b) parameters, and ratios of scaling parameters (c) of PT9 and PT12 approaches against proposed PTCT approach. Abbreviations: PTCT = proposed approach; PT9 and PT12 = published approach by 9- or 12-parameter coregistration.; LR = left-to-right; VD = ventral-to-dorsal, and PA = posterior-to-anterior directions or axes.
