1 Brain Stimulation Laboratory, Department of Psychiatry, Medical University of South Carolina, Charleston, SC, USA; Ralph H. Johnson VA Medical Center, Charleston, SC, USA. Electronic address: georgem@musc.edu.
2 Brain Stimulation Laboratory, Department of Psychiatry, Medical University of South Carolina, Charleston, SC, USA.
3 Private Practice, Pawley's Island, SC, USA.
4 Brain Stimulation Laboratory, Department of Psychiatry and Behavioral Sciences, Stanford University, Palo Alto, CA, USA.