Department of Surgery;
Faculty of Medicine and pharmaceutical sciences;
University of Douala;
Douala;
Cameroon;
Neurosurgical Unit;
General Hospital of Douala;
Douala;
Cameroon;
Faculty of Medicine and Biomedical Sciences;
University of Yaoundé;
Yaounde;
Cameroon;
Service of Neurosurgery;
Central Hospital of Yaoundé;
Yaoundé;
Cameroon;