1. Department of Anaesthesiology, All India Institute of Medical Sciences (AIIMS), Rishikesh, Uttarakhand, India
2. Department of Neurosurgery, All India Institute of Medical Sciences (AIIMS), Rishikesh, Uttarakhand, India
3. Department of Community Medicine, All India Institute of Medical Sciences (AIIMS), Rishikesh, Uttarakhand, India