1 Institute of Health Sciences/Geriatrics, University of Oulu, Oulu, Finland2Geriatric Clinic, Department of Medicine, University of Helsinki, Helsinki University Central Hospital, Helsinki, Finland3Department of Ophthalmology, Helsinki University Central H.
2 Geriatric Clinic, Department of Medicine, University of Helsinki, Helsinki University Central Hospital, Helsinki, Finland3Department of Ophthalmology, Helsinki University Central Hospital, Helsinki, Finland.