About the Authors

Ingrid M Bakker

To whom correspondence should be addressed. E-mail: IM_Bakker@hotmail.com

Affiliations Institute for Research in Extramural Medicine, VU University Medical Center Amsterdam, Amsterdam, The Netherlands, Department of General Practice, VU University Medical Center Amsterdam, Amsterdam, The Netherlands

Berend Terluin

Affiliations Institute for Research in Extramural Medicine, VU University Medical Center Amsterdam, Amsterdam, The Netherlands, Department of General Practice, VU University Medical Center Amsterdam, Amsterdam, The Netherlands

Harm W. J van Marwijk

Affiliations Institute for Research in Extramural Medicine, VU University Medical Center Amsterdam, Amsterdam, The Netherlands, Department of General Practice, VU University Medical Center Amsterdam, Amsterdam, The Netherlands

Daniëlle A. W. M van der Windt

Affiliations Institute for Research in Extramural Medicine, VU University Medical Center Amsterdam, Amsterdam, The Netherlands, Department of General Practice, VU University Medical Center Amsterdam, Amsterdam, The Netherlands

Frank Rijmen

Affiliation Department of Clinical Epidemiology and Biostatistics, VU University Medical Center Amsterdam, Amsterdam, The N

Willem van Mechelen

Affiliations Institute for Research in Extramural Medicine, VU University Medical Center Amsterdam, Amsterdam, The Netherlands, Department of Public and Occupational Health, VU University Medical Center Amsterdam, Amsterdam, The Netherlands

Wim A. B Stalman

Affiliations Institute for Research in Extramural Medicine, VU University Medical Center Amsterdam, Amsterdam, The Netherlands, Department of General Practice, VU University Medical Center Amsterdam, Amsterdam, The Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

IMB conducted the research, analysed the data, and wrote the article. BT developed the intervention. BT and HWJvM participated in the design and co-ordination of the trial. BT, HWJvM, DAWMvdW, and WABS participated in writing the article. FR advised and participated in analysing the data. WvM and WABS advised on the content of the study design. All authors provided comments on the drafts and approved the final version.