Towards a Hierarchical User Requirement Structure for Upper Limb Assistive Robotics. - Susanne Frennert; Maria Pozzi; Johanna Persson; Mariagrazia D'Ippolito; Donatella Mattia; Eva Díez-Rodríguez; Antonio Oliviero; Sara Fernández-Canosa; Fátima Villamayor Vega; Alessandro Giannotta; Simone Rossi 002; Andrea d'Avella; et al. (ACM Trans. Hum. Robot Interact., 2025)