Received: 27 June 2022
Accepted: 8 November 2022
First Online: 15 November 2022
: Ethics approvals were obtained from the Deakin University Ethics Committee (ID numbers: EC62–2009 and HEAG-H 01_2018), the Victorian Department of Education and Early Childhood Development (ID number: 2011_001151) and the Victorian Department of Education and Training (ID number: 2018_003666). School principals from participating schools provided written organisational consent; and the written consent was provided by the primary caregiver of the children, and the children themselves.
: Not applicable.
: JW is currently the Director of the WHO Collaborating Centre on Population Salt Reduction. All other authors declare no competing interests related to this study.