Prof. Ahmed AS Shakal    
     
                                                 Professor of Neurosurgery    
                                                 Head of Stereotactic & Functional Unit    
                                                 Tanta University, Tanta, Egypt    
                                                 Loaloat  El-Nady  Building, El-Nady St Tanta 31111, Egypt,    
                                                 Cell               00201111494111    
                                                 Tel Home :   0020403405035    
                                                 Tel Clinic :    0020403314858    
                                                 Email :      ahmedshakal@med.tanta.edu.eg