University of Cartagena, Cartagena de Indias, Colombia;
Department of Neurosurgery, Neurosurgery Teaching Hospital, Baghdad, Iraq;
Department of Surgery, College of Medicine, University of Al-Qadisiyah, Iraq;
Department of Neurosurgery, Universidad Nacional Autonoma de Nicaragua, Managua, Nicaragua;
Department of Neurosurgery, Neurosurgery Teaching Hospital, Baghdad, Iraq;
Department of Neurosurgery, Neurosurgery Teaching Hospital, Baghdad, Iraq;
Department of Neurosurgery, Neurosurgery Teaching Hospital, Baghdad, Iraq;
Department of Neurosurgery, Neurosurgery Teaching Hospital, Baghdad, Iraq;
Department of Neurosurgery, Neurosurgery Teaching Hospital, Baghdad, Iraq;
Department of Neurosurgery, Neurosurgery Teaching Hospital, Baghdad, Iraq;