About the Authors

Jurjen van der Schans

j.van.der.schans@rug.nl (JvdS); m.j.postma@rug.nl (MJP)

Affiliation Unit of PharmacoEpidemiology & PharmacoEconomics (PE2), Department of Pharmacy, University of Groningen (RUG), Groningen, the Netherlands

Nikos Kotsopoulos

Affiliation Unit of PharmacoEpidemiology & PharmacoEconomics (PE2), Department of Pharmacy, University of Groningen (RUG), Groningen, the Netherlands

Pieter J. Hoekstra

Affiliation University of Groningen, University Medical Center Groningen, Department of Psychiatry, Groningen, the Netherlands

Eelko Hak

Affiliation Unit of PharmacoEpidemiology & PharmacoEconomics (PE2), Department of Pharmacy, University of Groningen (RUG), Groningen, the Netherlands

Maarten J. Postma

j.van.der.schans@rug.nl (JvdS); m.j.postma@rug.nl (MJP)

Affiliations Unit of PharmacoEpidemiology & PharmacoEconomics (PE2), Department of Pharmacy, University of Groningen (RUG), Groningen, the Netherlands, University of Groningen, University Medical Center Groningen, Institute of Science in Healthy Aging & healthcaRE, Groningen, the Netherlands

Competing Interests

PJH has been member of paid advisory board meetings of Shire and Eli Lilly and has received an unrestricted research grant from Shire. MJP has received grants, honoraria and travel stipends from various pharmaceutical companies, inclusive those interested in the subject matter of this paper. JvdS, NK and EH declare that they have no conflict of interest in relation to this work. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: MJP JvdS. Performed the experiments: JvdS. Analyzed the data: JvdS MJP. Wrote the paper: NK PJH EH JvdS MJP.