1. Department of Neurosurgery, Chhatrapati Shahuji Maharaj Medical University, Lucknow, UP, India.
2. Department of Radiodiagnosis, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India.
3. Department of Diagnostic and Interventional Imaging, University of Texas Medical School at Houston, Houston, Texas.
4. Department of Neurology, Chhatrapati Shahuji Maharaj Medical University, Lucknow, UP, India.
5. Department of Biostatistics, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, UP, India.