Erratum

Following publication of this article [1], it has come to our attention that some of the terminology used in the article could be difficult to interpret. In table 1, the description of the measurements should begin with t0. This would mean that t1 becomes t0, t2 becomes t1, and so forth. Furthermore, where schoolchildren are referred to in groups 1–8, groups 1 and 2 refer to Kindergarten children aged 4–6 years, and groups 3–8 correspond to children in Grades 1–6 aged 6-12 years. The correct abbreviation for 'The Healthy primary School of the Future' is HPSF.