1. Department of Neurology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India;
2. Department of Emergency Medicine, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India;
3. Department of Biostatistics, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India;
4. Department of Radiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India