[1] All India Inst Med Sci, Dept Neurol, Rishikesh, Uttarakhand, India
[2] All India Inst Med Sci, Dept Psychiat, Rishikesh, India
[3] Inst Neurosci, Dept Neurol, Kolkata, India
[4] Post Grad Inst Med Educ & Res, Dept Neurol, Chandigarh, India
[5] All India Inst Med Sci, Dept Neurol, New Delhi, India
[6] Vikram Hosp, Ctr Parkinsons Dis & Movement Disorders, Bengaluru, India
[7] Nizams Inst Med Sci, Dept Neurol, Hyderabad, India
[8] Shree Krishna Hosp, Dept Neurol, Anand, Gujarat, India
[9] Jaslok Hosp, Dept Neurol, Mumbai, Maharashtra, India
[10] Medanta Hosp, Dept Neurol, Gurugram, India