Assessing the Effectiveness of Interactive Robot-Assisted Virtual Health Coaching for Health Literacy and Disease Knowledge of Patients with Chronic Kidney Disease: Quasiexperimental Study - Nai-Jung Chen; Ching-Hao Chang; Chiu-Mieh Huang; Fen-He Lin; Li-Ting Lu; Kuan-Yi Liu; Chih-Lin Lai; Chin-Yao Lin; Yi-Chou Hou; Jong-Long Guo (Journal of Medical Internet Research)