1. World Health Organization: Ageing and Health https://www.who.int/news-room/fact-sheets/detail/ageing-and-health Accessed 05 Dec 2021
2. Kaiser Family Foundation https://www.kff.org/coronavirus-covid-19/issue-brief/nursing-facility-staffing-shortages-during-the-covid-19-pandemic/ Accessed 12 May 2022
3. World Health Organization: Health workforce https://www.who.int/health-topics/health-workforce#tab=tab_1 Accessed 12 May 2022
4. Bundesministerium für Gesundheit: Konzertierte Aktion Pflege, Zweiter Bericht zum Stand der Umsetzung der Vereinbarung der Arbeitsgruppen 1 bis 5 [Concerted Action on Long-Term Care. Second Report on the Status of Implementation of the Agreements of Working Groups 1 to 5]. Bundesministerium für Gesundheit [Federal Ministery of Health]. Berlin, Germany (2021)
5. Goodrich, M.A., Schultz, A.C.: Human-robot interaction: a survey. Foundations Trends Human-Computer Interaction 1(3), 203–275 (2007)