1. Department of Rheumatology Institute of Neurosciences Kolkata (I‐NK) Kolkata India
2. Department of Rheumatology All India Institute of Medical Sciences New Delhi India
3. Department of Neurology Institute of Neurosciences Kolkata (I‐NK) Kolkata India
4. Department of Radiology Institute of Neurosciences Kolkata (I‐NK) Kolkata India