Research Article Br Dent J 2017;222: 870–877
In the original article, Table 1 was incorrect as the first column was missing. The correct version of Table 1 is given below:
We apologise for any confusion caused.
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The online version of the original article can be found at 10.1038/sj.bdj.2017.500
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Erratum. Br Dent J 223, 234 (2017). https://doi.org/10.1038/sj.bdj.2017.662
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DOI: https://doi.org/10.1038/sj.bdj.2017.662