About the Authors

Concepció Violan

Affiliations Central Research Unit, Institut Universitari d'Investigació en Atenció Primària Jordi Gol, Barcelona, Catalunya, Spain, Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain

Quintí Foguet-Boreu

Affiliations Central Research Unit, Institut Universitari d'Investigació en Atenció Primària Jordi Gol, Barcelona, Catalunya, Spain, Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain

Gemma Flores-Mateo

Affiliations Central Research Unit, Institut Universitari d'Investigació en Atenció Primària Jordi Gol, Barcelona, Catalunya, Spain, Universitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), Spain

Chris Salisbury

Affiliation Centre of Academic Primary Care, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

Jeanet Blom

Affiliation Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, The Netherlands

Michael Freitag

Affiliation Institute of General Practice and Family Medicine, Jena University Hospital, Friedrich-Schiller-University, School of Medicine, Jena, Germany

Liam Glynn

Affiliation Discipline of General Practice, National University of Ireland, Galway, Ireland

Christiane Muth

Affiliation Institute of General Practice, Johann Wolfgang Goethe University, Frankfurt/Main, Frankfurt, Germany

Jose M. Valderas

J.M.Valderas-Martinez@exeter.ac.uk

Affiliation Health Services & Policy Research Group, School of Medicine, University of Exeter, Exeter, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JMV CV QFB. Performed the experiments: JMV CV QFB GFM CS JB MF LG CM. Analyzed the data: QFB CV GFM JMV. Contributed reagents/materials/analysis tools: JMV CV QFB GFM CS JB MF LG CM. Wrote the paper: QFB CV GFM JVM. Critically revised and approved final version of the manuscript: JMV CV QFB GFM CS JB MF LG CM.