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. 2009 Jan 30;4(1):e3675. doi: 10.1371/journal.pone.0003675

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Oomen et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Arch back nursing towards the entire litter in control and MD litters on PND1–7. There is a significant increase after PND3 (F = 7.89, p = 0.02).