1 Department of Psychiatry, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland. Electronic address: markus.varheenmaa@uef.fi.
2 Centre for Interdisciplinary Brain Research, Department of Psychology, University of Jyväskylä, Finland.
3 Health Services Research Unit, Akershus University Hospital, Lørenskog, Norway; Oslo Centre for Biostatistics and Epidemiology, University of Oslo, Oslo, Norway.
4 Pihlajamäki Primary Health Care Centre, Helsinki, Finland.
5 University Hospital of Old Age Psychiatry, University of Bern, Bern, Switzerland; Department of Neuropsychology, Lucerne Psychiatry, Lucerne, Switzerland; Berenson-Allen Center for Noninvasive Brain Stimulation, Division of Cognitive Neurology, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States.
6 Institute of Clinical Medicine, University of Oslo, Oslo, Norway; R&D Department, Division of Mental Health Services, Akershus University Hospital, Lørenskog, Norway; Department of Psychiatry, University of Helsinki, Helsinki, Finland.