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Contributors All authors conceived, reviewed and approved the manuscript. GAW prepared the manuscript.
Funding This research received no specific grant from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests All authors published a systematic review discussed in this editorial and have been investigators on trials that have evaluated foot orthoses, which have been supplied for free or at a reduced cost.
Patient consent Not required.
Provenance and peer review Not commissioned; internally peer reviewed.
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