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Professor Patria Hume collaborated in designing the overarching IRB\/NZR\/AUT RugbyHealth project, was responsible for the original conception of the study, wrote the funding application, obtained ethical approval, helped recruit participants, analysed the initial data, helped interpret the results of the final COP data and co-authored the manuscript. Associate Professor Gwyn Lewis helped recruit participants, helped with data analysis and interpretation of the results, and co-authored the manuscript. Assistant Professor Scott Brown provided liaison for participants for the study, helped recruit participants, collected the balance data and co-authored the manuscript. Dr Usman Rashid re-analysed the balance data for COP metrics and co-authored the manuscript. Professor Alice Theadom helped recruit participants, helped with interpretation of the results and co-authored the manuscript. Professor Denise Taylor provided technical advice on the clinic testing protocol, developed the methods for the COP analysis of the data and co-authored the manuscript.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Contributors statement"}},{"value":"World Rugby and New Zealand Rugby provided funding for the project. All authors declare that they have no conflict of interest.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Authors' conflicts of interest"}},{"value":"The study was performed in accordance with the ethical standards of the Declaration of Helsinki given ethics approval was obtained from the Auckland University of Technology Ethics Committee (AUTEC #12\/252). Participants gave informed consent after reading a participant information sheet about the project.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval"}},{"value":"The study was funded by World Rugby (International Rugby Board) and New Zealand Rugby, and staff salaries provided in kind by the Sport Performance Research Institute New Zealand (SPRINZ), the National Institute for Stroke and Applied Neurosciences (NISAN) and the Health and Rehabilitation Research Institute (HRRI) of Auckland University of Technology.","order":6,"name":"Ethics","group":{"name":"EthicsHeading","label":"Funding"}},{"value":"Not commissioned, externally peer reviewed.","order":7,"name":"Ethics","group":{"name":"EthicsHeading","label":"Provenance and peer review"}}]}}