Acceptability and Usability of a Socially Assistive Robot Integrated With a Large Language Model for Enhanced Human-Robot Interaction in a Geriatric Care Institution: Mixed Methods Evaluation - Lauriane Blavette; Sébastien Dacunha; Xavier Alameda-Pineda; Daniel Hernández García; Sharon Gannot; Florian Gras; Nancie Gunson; Séverin Lemaignan; Michal Polic; Pinchas Tandeitnik; Francesco Tonini; Anne-Sophie Rigaud; et al. (JMIR Human Factors)