Erratum to: Eur Arch Paediatr Dent DOI 10.1007/s40368-017-0289-5

As standard, the level of recommendation according to the Scottish Intercollegiate Guideline Network (SIGN 2008) is reported alphabetically (A/B/C/D/Good practice points) and the level of evidence is reported numerically (1++/1+/1−/2++/2+/2−/3/4). In this guideline article some of the levels of evidence were mistakenly assigned letters rather than numbers:

A instead of the correct 1+

B instead of the correct 2++

C instead of the correct 2+

D instead of the correct 3

The article has now been corrected.