1. Faculty of Medicine, University of La Sabana, Chia,
2. Faculty of Medicine, Associate Professor, University of Cartagena, Cartagena, Colombia.
3. Neurosurgery Resident, Associate Professor, University of Cartagena, Cartagena, Colombia.
4. Resident of Otorhinolaryngology, Associate Professor, University of Cartagena, Cartagena, Colombia.
5. Department of Neurosurgery, Associate Professor, University of Cartagena, Cartagena, Colombia.