1. Department of Psychiatry, Berhampore Mental Hospital, Berhampore, West Bengal, India
2. Department of General Medicine, Burdwan Medical College and Hospital, Burdwan, West Bengal, India
3. Department of Neuromedicine, Bangur Institute of Neurosciences, Kolkata, West Bengal, India
4. Department of Psychiatry, Institute of Psychiatry- Center of Excellence, Kolkata, West Bengal, India
5. Department of Neurology, University Hospital “12 de Octubre”, Madrid, Spain
6. Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, Spain
7. Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
8. Department of Medicine, Faculty of Medicine, Complutense University, Madrid, Spain