1. Nurse staffing and education and hospital mortality in nine European countries: A retrospective observational study;Aiken;Lancet,2014
2. Nursing skill mix in European hospitals: Cross-sectional study of the association with mortality, patient ratings, and quality of care;Aiken;BMJ Quality & Safety,2017
3. Registered nurses’ attitudes towards the role of the healthcare assistant;Alcorn;Nurs Stand,2009
4. American Association of Nursing 2018 Nurse title protection http://www.nursingworld.org/MainMenuCategories/Policy-Advocacy/State/Legislative-Agenda-Reports/State-TitleNurse
5. Are healthcare aides underused in long-term care? A cross-sectional study on continuing care facilities in Canada;Arain;British Medical Journal Open,2017