1 Department of Clinical Geriatrics, Karolinska Institutet, Stockholm, Sweden; National Institute for Health and Welfare, Helsinki, Finland; Institute of Clinical Medicine/Neurology, University of Eastern Finland, Kuopio, Finland. Electronic address: [email protected].
2 Department of Clinical Geriatrics, Karolinska Institutet, Stockholm, Sweden.
3 Department of Clinical Geriatrics, Karolinska Institutet, Stockholm, Sweden; National Institute for Health and Welfare, Helsinki, Finland.