Evaluation of an AI-Based Chatbot Providing Real-Time Feedback in Communication Training for Mental Health Care Professionals: Proof-of-Concept Observational Study. - Herschbach, Lea; Festl-Wietek, Teresa; Stegemann-Philipps, Christian; Sonanini, Alessandra; Herrmann, Bernd; Erschens, Rebecca; Herrmann-Werner, Anne; Holderried, Friederike (Journal of Medical Internet Research, 2025)