1. Hospital Univesitario Miguel Servet, Zaragoza, Spain
2. Spanish Centre for Evidence-Based Nursing and Healthcare: A JBI Centre of Excellence, Instituto de Salud Carlos III, Madrid, Spain
3. Nursing and Healthcare Research Unit (Investén-isciii), Madrid, Spain
4. Research Network on Chronicity, Primary Care and Health Prevention and Promotion (RICAPPS), Madrid, Spain
5. Biomedical Research Network Centre (CIBER) on Frailty and Healthy Ageing (CIBERFES), Instituto de Salud Carlos III, Madrid, Spain
6. Cochrane Czech Republic, Czech Republic: A JBI Centre of Excellence, Czech GRADE Network, Institute of Health Information and Statistics of the Czech Republic, Prague, Czech Republic
7. Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, Brno, Czech Republic