Stenvall Michael, Elinge Eva, von Heideken Wågert Petra, Lundström Maria, Gustafson Yngve, Nyberg Lars
Department of Community Medicine and Rehabilitation, Geriatric Medicine, Umeå University, SE-901 87 Umeå, Sweden.
Age Ageing. 2005 May;34(3):294-7. doi: 10.1093/ageing/afi042.