1. Neurocritical Care, Addenbrookes Hospitals, Cambridge University Hospitals, Cambridge, United Kingdom

2. Department of Anaesthesiology, Trivandrum Medical College, Trivandrum, India

3. University of Kerala, Trivandrum, India

4. Division of Neuroanaesthesia, Department of Anaesthesiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India