About the Authors
- Ellen Piek
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* E-mail: e.piek@umcg.nl
Affiliation Department of General Practice, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
- Boudewijn J. Kollen
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Affiliation Department of General Practice, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
- Klaas van der Meer
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Affiliation Department of General Practice, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
- Brenda W. J. H. Penninx
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Affiliations Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands, Department of Psychiatry, Leiden University Medical Center, Leiden, The Netherlands, Department of Psychiatry, EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands
- Willem A. Nolen
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Affiliation Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
Competing Interests
Although WA Nolen received grants form the Netherlands Organisation for Health Research and Development, the European Union, the Stanley Medical Research Institute, Astra Zeneca, Eli Lilly, GlaxoSmithKline and Wyeth, received honoraria and speaker's fees from Astra Zeneca, Eli Lilly, Pfizer, Servier and Wyeth and participated in advisory boards of Astra Zeneca, Cyberonics, Pfizer and Servier, this does not alter the authors' adherence to PLOS ONE policies on sharing data and materials. All other authors have no competing interests to declare.
Author Contributions
Conceived and designed the experiments: EP BJK KvdM BWJHP WAN. Performed the experiments: EP BJK. Analyzed the data: EP BJK KvdM WAN. Contributed reagents/materials/analysis tools: BJK BWJHP. Wrote the paper: EP BJK KvdM BWJHP WAN.