1. Bioaraba Nursing and Health Care Research Group Vitoria‐GasteizSpain
2. Osakidetza Basque Health Service Araba University Hospital Vitoria‐GasteizSpain
3. Bioaraba Epidemiology and Public Health Research Group Vitoria‐GasteizSpain
4. Clinical Research and Clinical Trials Unit Hospital Clínico San Carlos IdISSC Madrid Spain
5. Bioaraba Vitoria‐GasteizSpain