1. Department of Human Anatomy and Embryology; Faculty of Medicine; Madrid Complutense University; Madrid Spain
2. Institute of Morphofunctional Sciences; Madrid Complutense University; Madrid Spain
3. Unit of Neuroradiology; Donostia University Hospital; San Sebastian Spain
4. Department of Neurosciences; School of Medicine and Dentistry; The University of the Basque Country (UPV/EHU); Leioa Spain