Corrigendum: Using Transcranial Direct Current Stimulation to Augment the Effect of Motor Imagery-Assisted Brain-Computer Interface Training in Chronic Stroke Patients—Cortical Reorganization Considerations - Chew, Effie; Teo, Wei-Peng; Tang, Ning; Ang, Kai Keng; Ng, Yee Sien; Zhou, Juan Helen; Teh, Irvin; Phua, Kok Soon; Zhao, Ling; Guan, Cuntai (Frontiers in Neurology, 2020)