1. Department of General Medicine, Burdwan Medical College and Hospital, Burdwan, West Bengal, India
2. Department of Biochemistry, All India Institute of Medical Sciences (AIIMS), Jodhpur, Rajasthan, India
3. Department of Neurology, University Hospital “12 de Octubre,” Madrid, Spain
4. Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
5. Department of Medicine, Universidad Complutense, Madrid, Spain