1. Department of NeuroSurgery, Sir Sunder Lal Hospital, IMS, BHU, Varanasi, Uttar Pradesh, India
2. Department of NeuroSurgery, P.G.I.M.E.R., Dr Ram Manohar Lohia Hospital, New Delhi, India
3. Department of Pathology and Microbiology, Northern Railway Central Hospital, New Delhi, India