1. Endocrinology Unit; Central Hospital of Army; Algiers Algeria
2. Glasgow University School of Medicine; Glasgow UK
3. Critical Care Unit; Central Hospital of Army; Algiers Algeria
4. Neurosurgery Unit; Central Hospital of Army; Algiers Algeria
5. Nuclear Medicine Unit; Central Hospital of Army; Algiers Algeria
6. Critical Care Unit; Salim Zemirli Hospital; Algiers Algeria
7. Neurosurgery Unit; Salim Zemirli Hospital; Algiers Algeria
8. Faculty of Medicine of Algiers; Algiers Algeria