[1] Univ Palermo, Dept Biomed Neurosci & Adv Diagnost, Post Grad Residency Program Neurol Surg, Neurosurg Clin,AOUP Paolo Giaccone,Sch Med, Palermo, Italy
[2] Texas A&M Univ, Coll Med, College Stn, TX USA
[3] Garibaldi Hosp, Dept Head & Neck Surg, Neurosurg Unit, Catania, Italy