Proof of Concept of a Polycentric Joint Orthosis with 2 DoF for Elderly People with Motor Impairment of the Knee Joint. - Deyby Huamanchahua; Aldo Calderón-Buendia; Jimena Malpartida-Paredes; Heather Pinto-Urrutia; Gonzalo Rivera-Paredes (UEMCON, 2022)