Amer Jaradat1, Claudio Pollo2. 1. Department of Neurosciences, Jordan University of Science and Technology, Ar Ramtha 3030, Ar-Ramtha, Jordan. Amerjaradatsh@gmail.com. 2. Department of Neurosurgery, Inselspital, University Hospital Bern, and University of Bern, 3010, Bern, Switzerland.