. 2018 Dec 19;17(2):153–160. doi: 10.1111/idh.12372
© 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 2.
Flow diagram