1 Department of Neurological Science, Faculty of Medicine, University of Chile, Santiago, Chile; Biomedical Neuroscience Institute (BNI), Faculty of Medicine, University of Chile, Santiago, Chile. Electronic address: jm_matamala@med.uchile.cl.
2 Department of Neurological Science, Faculty of Medicine, University of Chile, Santiago, Chile.
3 Neuroradiology Service, Institute of Neurosurgery Asenjo, Santiago, Chile.
4 Department of Neurological Science, Faculty of Medicine, University of Chile, Santiago, Chile; Neurology Service, Salvador Hospital, Santiago, Chile.