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. 2017 Jul 14;7:5459. doi: 10.1038/s41598-017-05764-5

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Mandibular right first, second and third molars in lingual view of (a) coated (MAM1491) and (b) hairless dog (MAM1497). Note the clearly developed metaconid (m), entoconid (e) and hypoconulid cusps (hy) in the coated dog which are lacking in the hairless dog. h = hypoconid, pa = paraconid, pt = protoconid. Teeth are shown in lingual view. Mesial is to the left. The black scale bar equals 3 mm.