Development and Usability of a Prototype Upper Extremities Lever-Driven Exercise System oleh Themistoklis Tsatalas, George Bellis, Evangeli Karampina, Charalampos Krommidas, Fotios Tsilfoglou, Athanasios Patas, Christos Fotos, Christos Kokkotis, Athanasios Z. Jamurtas, Giannis Giakas