1. German Center for Neurodegenerative Diseases e.V. (DZNE), Site Rostock/Greifswald, Greifswald, Germany
2. Department of Nursing, Umeaa University, Umeaa, Sweden
3. School of Nursing and Midwifery, La Trobe University, Melbourne, Australia
4. German Center for Neurodegenerative Diseases e.V. (DZNE), Site Witten, Witten, Germany
5. Institute for Community Medicine, University Medicine Greifswald (UMG), Greifswald, Germany