1. The Black Dog Institute, Prince of Wales Hospital and School of Psychiatry, University of New South Wales, Randwick, NSW 2031, Australia
2. Brain Dynamics Centre, Westmead Hospital, Westmead, NSW 2145, Australia
3. School of Physics, A28, University of Sydney, NSW 2006, Australia
4. Department of Clinical Neurophysiology, VU University Medical Centre, Amsterdam, The Netherlands