1. Institute for Ageing and Health, Newcastle University, Newcastle, UK
2. Psychiatric Hospital ‘Skopje’, Skopje, R. Macedonia
3. Medical School, University of Sts Cyril and Methodius, Skopje, R. Macedonia
4. Institute of Pathophysiology and Nuclear Medicine, Skopje, R. Macedonia
5. 3rd Department of Neurology, Aristotle University of Thessaloniki, Greece