[1] Institute of the Human Brain, Russian Academy of Science, 9, Pavlov str, 197376, Saint-Petersburg, Russia
[2] Turku PET Centre, Radiopharmaceutical Chem. Laboratory, Porthaninkatu 3, FIN 20500 Turku, Finland
[3] Serv. Hosp. Frederic Joliot, Departement de Recherche Medicale, CEA, 4 place du General Leclerc, F-91406 Orsay, France
[4] Karolinska Institutet, Department of Clinical Neuroscience, Karolinska Hospital, S-17176, Stockholm, Sweden