. 2018 Sep 27;17(1):27–38. doi: 10.1111/idh.12364
© 2018 The Authors. International Journal of Dental Hygiene Published by John Wiley & Sons Ltd.
This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Figure 1.
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