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Variable-ratio pushrim-activated power-assist wheelchair eases wheeling over a variety of terrains for elders11A commercial party with a direct financial interest in the results of the research supporting this article has conferred or will confer a financial benefit on the author or 1 or more of the authors

Financial BenefitElders11a Commercial PartyKinesiologyAssistive TechnologyDirect Financial InterestDisabilityAssistive DeviceEducationRehabilitationRehabilitation EngineeringMedicineMobility SupportPhysical Therapy