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Louise Corben is supported by a Medical Research Futures Fund Next Generation Career Development Fellowship under Grant APP1143098 and receives funding from Friedreich Ataxia Research Alliance. David Szmulewicz is supported by the Florey Institute of Neuroscience under Grant GNT1101304 and the National Health and Medical Research Council (NHMRC) of Australia under Grant APP1129595. Martin Delatycki receives research funding from the NHMRC, Medical Research Future Fund, Friedreich Ataxia Research Alliance and Friedreich Ataxia Research Association. Malcolm Horne has stock ownership in medically-related fields, intellectual property rights and consultancies (Global Kinetics Corporation). Khoa D Nguyen, Pubudu Pathirana and Melissa Roberts report no conflict of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of Interest"}},{"value":"Ethics committee approval was provided by Monash Health Human Research Ethics Committee (HREC 02114A). 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