1. Department of General Medicine, Burdwan Medical College & Hospital, Burdwan, India
2. Department of Ophthalmology, Burdwan Medical College & Hospital, Burdwan, Madrid, India
3. Department of Neurology, University Hospital “12 de Octubre”, Spain
4. Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
5. Department of Medicine, Complutense University, Madrid, Spain