1. Christensen, K., Doblhammer, G., Rau, R., Vaupel, J.W.: Ageing populations: the challenges ahead. Lancet (2009)
2. WHO World Health Organization: World Report on Aging and Health. WHO Press, Geneve (2015)
3. Coleman, R.: Improving the quality of life for older people by design. In: Graafmans, J., Taipale, V., Charness, N. (eds.) Gerontechnology: A Sustainable Investment in the Future. IOS Press, Amsterdam (1998)
4. Groeneveld, B., Dekkers, T., Boon, B., D’Olivo, P.: Challenges for design researchers in healthcare. Des. Health 2(2), 305–326 (2018)
5. Slattery, P., Saeri, A.K., Bragge, P.: Research co-design in health: a rapid overview of reviews. Health Res Policy Syst. 18(1), 17 (2020)