1. Iberoamerican Cochrane Centre, Sant Antoni Maria Claret, 167, 08025 Barcelona, Spain
2. Institut de Recerca Sant Pau (IR SANT PAU), Sant Quintí 77-79, 08041 Barcelona, Spain
3. Avedis DonabedianResearch Institute (FAD), Universitat Autònoma de Barcelona, 008037 Barcelona, Spain
4. Network for Research on Chronicity, Primary Care, and Health Promotion (RICAPPS), 08007 Barcelona, Spain
5. Netherlands Institute for Health Services Research (NIVEL), 3513 CR Utrecht, The Netherlands
6. Department of Primary Education, School of Education, University of Ioannina, 45110 Ioannina, Greece
7. Institute for Medical Technology Assessment, Erasmus University Rotterdam, P.O. Box 1738, 3062 PA Rotterdam, The Netherlands
8. OptiMedis, 20095 Hamburg, Germany
9. Immunonutrition and Clinical Nutrition Unit, Department of Rheumatology and Clinical Immunology, Medical School, University of Thessaly, Biopolis Campus, 43100 Larissa, Greece
10. Spanish Society of Family Medicine, Infanta Mercedes Primary Care Centre, 28020 Madrid, Spain
11. Evaluation Unit (SESCS), Canary Islands Health Service (SCS), Network for Research on Chronicity, Primary Care, and Health Promotion (RICAPPS), 38109 Tenerife, Spain
12. School of Nursing, Health Science and Disability Studies, ATU St Angelas, F91 C643 Sligo, Ireland
13. Florence Nightingale Faculty of Nursing, Midwifery & Palliative Care, King’s College London, London SE1 8WA, UK
14. Institute of General Practice, Faculty of Medicine, University Hospital Cologne, University of Cologne, 50923 Cologne, Germany
15. European Research Executive Agency, 1000 Brussels, Belgium
16. CIBER Bioengineering, Biomaterials and Nanotechnology, Instituto de Salud Carlos III, 28220 Madrid, Spain
17. Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), 28029 Madrid, Spain