Combined Use of Virtual Reality and a Chatbot Reduces Emotional Stress More Than Using Them Separately. - Atsuko Matsumoto; Takeshi Kamita; Yukari Tawaratsumida; Ayako Nakamura; Harumi Fukuchimoto; Yuko Mitamura; Hiroko Suzuki; Tsunetsugu Munakata; Tomoo Inoue (J. Univers. Comput. Sci., 2021)