1. Department of Neurosurgery, Narayana Medical College Hospital, Chinthareddypalem, Nellore, Andhra Pradesh, India
2. Department of Radiology, Narayana Medical College Hospital, Chinthareddypalem, Nellore, Andhra Pradesh, India
3. Department of Anesthesia, Narayana Medical College Hospital, Chinthareddypalem, Nellore, Andhra Pradesh, India
4. Faculty of Medicine, Neurosurgeon-Critical Care, Center for Biomedical Research (CIB), University of Cartagena, Cartagena de Indias, Bolivar, Colombia