[1] All India Inst Med Sci, Dept Neurol, New Delhi, India
[2] Max Healthcare, Dept Cardiol, New Delhi, India
[3] Apollo Hosp, Dept Neurol, New Delhi, India
[4] Lakeshore Hosp, Dept Neurol, Kochi, Kerala, India
[5] KEM Hosp, Dept Neurol, Pune, Maharashtra, India
[6] Postgrad Inst Med Educ & Res, Dept Neurol, Chandigarh, India
[7] Nizams Inst Med Sci, Dept Neurol, Hyderabad, Telangana, India
[8] Dayanand Med Coll, Dept Neurol, Ludhiana 141001, Punjab, India
[9] NH Inst Neurosci, Bangalore, Karnataka, India