1. Division of Neurosurgery, Department of Neuroscience, Uppsala University, Uppsala, Sweden.
2. ADx NeuroSciences, Technologiepark 4, Gent, Belgium.
3. Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.
4. University College London, Institute of Neurology, Queen Square, London, United Kingdom.