1. National Institute of Mental Health, Klecany, Czech Republic
2. Charles University, Third Faculty of Medicine and University Hospital Kralovske Vinohrady, Department of Neurology, Prague, Czech Republic
3. Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine Charles University and General University Hospital in Prague, Czech Republic
4. Department of Medical Chemistry and Clinical Biochemistry, Motol University Hospital, Prague, Czech Republic