1. Department of Psychiatry & Behavioral Sciences, Division for Brain Stimulation & Neurophysiology, Duke University, Durham, NC, USA;
2. Department of Electrical & Computer Engineering, Duke University, Durham, NC, USA;
3. Department of Neurosurgery, Duke University, Durham, NC, USA;
4. Intramural Research Program, Experimental Therapeutics & Pathophysiology Branch, Noninvasive Neuromodulation Unit, National Institutes of Health, National Institute of Mental Health, Bethesda, MD, USA;
5. Duke Institute for Brain Sciences, Duke University, Durham, NC, USA