Beta-Band Frequency Peaks Inside the Subthalamic Nucleus as a Biomarker for Motor Improvement After Deep Brain Stimulation in Parkinson's Disease. - Konstantinos P. Michmizos 001; Polytimi Frangou; Pantelis Stathis; Damianos Sakas; Konstantina S. Nikita (IEEE J. Biomed. Health Informatics, 2015)