1. University Hospital of Old Age Psychiatry and Psychotherapy, University of Bern , 3000 Bern , Switzerland
2. Graduate School for Health Sciences, University of Bern , 3012 Bern , Switzerland
3. University Hospital of Psychiatry and Psychotherapy, University of Bern , 3000 Bern , Switzerland
4. Department of Neonatology, University Hospital Zurich and University of Zurich , 8006 Zürich , Switzerland
5. Neurochemistry Laboratory , Department of Clinical Chemistry, Amsterdam Neuroscience, Neurodegeneration, Amsterdam UMC, , 1081 HV Amsterdam , Netherlands
6. Vrije Universiteit Amsterdam , Department of Clinical Chemistry, Amsterdam Neuroscience, Neurodegeneration, Amsterdam UMC, , 1081 HV Amsterdam , Netherlands
7. Division of Psychiatric Specialties, Geneva University Hospitals (HUG) , 1205 Geneva , Switzerland