1 University Institute of Diagnostic and Interventional Neuroradiology, Bern University Hospital, Inselspital, University of Bern, Freiburgstrasse 10, CH-3010, Bern, Switzerland. arsany_hakim@yahoo.com.
2 Department of Neurosciences and Mental Health (Neurology), Hospital Santa Maria, Lisbon, Portugal.
3 Institute of Anatomy, Faculty of Medicine, University of Lisbon, Lisbon, Portugal.