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. 2014 Feb 28;14:8. doi: 10.1186/1471-213X-14-8

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Copyright © 2014 Motch Perrine et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Principal Components Analysis of form and shape: E17.5 and P0 data combined. A) Placement of E17.5 and P0 mouse crania on PC1 and PC2 in the skull form space as estimated by principal component analysis of all linear distances among 33 cranial landmarks. B) Placement of the all E17.5 and P0 mouse crania on PC1 and PC2 in the skull shape space (as estimated by principal component analysis of all possible linear distances scaled by the age and genotype-specific geometric sample mean) among cranial 33 landmarks on all E17.5 and P0 mice.