1. Division of Neuroimaging and Interventional Neuroradiology, Department of Radiodiagnosis and Imaging, Postgraduate Institute of Medical Education and Research, Chandigarh, India
2. Division of Neuro and Vascular Intervention, Department of Neurology, Christian Medical College and Hospital, Ludhiana, Punjab, India
3. Department of Radiodiagnosis, VMMC and Safdarjung Hospital, New Delhi, India
4. Department of Radiodiagnosis, Maulana Azad Medical College, New Delhi, India