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Paul Brocklehurst, Zoe Hoare, Chris Woods, Lynne Williams, Andrew Brand, Jing Shen, Matthew Breckons, James Ashley, Alison Jenkins, Lesley Gough, Philip Preshaw, Christopher Burton, Karen Shepherd & Nawaraj Bhattarai.

Paul Brocklehurst ^1,*, Zoe Hoare ¹, Chris Woods ¹, Lynne Williams ¹, Andrew Brand ¹, Jing Shen ², Matthew Breckons ², James Ashley ³, Alison Jenkins ¹, Lesley Gough ⁴, Philip Preshaw ^5,6, Christopher Burton ⁷, Karen Shepherd ⁸, Nawaraj Bhattarai ²

¹ School of Health Sciences, Bangor University, Bangor, UK
² Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
³ Woodlands Dental Practice, Liverpool, UK
⁴ Public Health England, Chester, UK
⁵ Faculty of Dentistry, National University of Singapore, , Singapore
⁶ Faculty of Dentistry, Newcastle University, Newcastle upon Tyne, UK
⁷ School of Allied and Public Health Professions, Canterbury Christ Church University, Canterbury, UK
⁸ Patient and public involvement representative, Bangor, UK
^* Corresponding author Email: p.brocklehurst@bangor.ac.uk

Declared competing interests of authors: Paul Brocklehurst was a member of the National Institute for Health Research (NIHR) Health Services and Delivery Research (HSDR) Funding Committee (2015–19), the NIHR Health Technology Assessment (HTA) Prioritisation Committee (2017–19) and the NIHR Academy Doctoral Research Fellowship panel (2016 to present). He has received personal fees from Colgate-Palmolive (New York, NY, USA) outside the submitted work. Zoe Hoare reports that she is an associate member of the NIHR HSDR board. Chris Woods reports grants from the Welsh Government outside the submitted work.