1. Brain Research Unit and MEG Core; O.V. Lounasmaa Laboratory; Aalto Neuroimaging; School of Science; Aalto University; Espoo Finland
2. Department of Clinical Neurophysiology; HUS Medical Imaging Center; Helsinki University Central Hospital; Finland
3. Department of Neurological Sciences; University of Helsinki; Finland
4. Department of Anaesthesia and Intensive Care Medicine; Pain Clinic; Helsinki University Central Hospital; Finland
5. Institute of Clinical Medicine; Faculty of Medicine; University of Helsinki; Finland
6. Department of Neurology; Helsinki University Central Hospital; Finland