1. Laboratory for Neurophysiology; Department of Molecular Cell Biology; Leiden University Medical Center; LUMC PZ S5-P; PO 9600; 2300 RC; Leiden; The Netherlands
2. The Queensland Brain Institute; University of Queensland; St Lucia; Qld; Australia
3. Department of Neurosurgery; University Medical Center Utrecht; Utrecht; The Netherlands
4. Department of Neurology; University of Massachusetts Medical School; Worcester; MA; USA