About the Authors

Helen L. Lutgers

Contributed equally to this work with: Helen L. Lutgers, Esther G. Gerrits

Affiliation Department of Internal Medicine, University Medical Center Groningen, Groningen, the Netherlands

Esther G. Gerrits

Contributed equally to this work with: Helen L. Lutgers, Esther G. Gerrits

e.g.gerrits@isala.nl

Affiliation Diabetes Center, Isala Clinics, Zwolle, the Netherlands

Wim J. Sluiter

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

Lielith J. Ubink-Veltmaat

Affiliation Family practice't Veen, Hattem, the Netherlands

Gijs W. D. Landman

Affiliation Diabetes Center, Isala Clinics, Zwolle, the Netherlands

Thera P. Links

Affiliations Department of Endocrinology, University Medical Center Groningen, Groningen, the Netherlands, Department of Medicine, University of Groningen, Groningen, the Netherlands

Reinold O. B. Gans

Affiliations Department of Internal Medicine, University Medical Center Groningen, Groningen, the Netherlands, Department of Medicine, University of Groningen, Groningen, the Netherlands

Andries J. Smit

Affiliations Department of Internal Medicine, University Medical Center Groningen, Groningen, the Netherlands, Department of Medicine, University of Groningen, Groningen, the Netherlands

Henk J. G. Bilo

Affiliations Department of Internal Medicine, University Medical Center Groningen, Groningen, the Netherlands, Diabetes Center, Isala Clinics, Zwolle, the Netherlands, Department of Medicine, University of Groningen, Groningen, the Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: HLL EGG WJS LJUV GWL. Wrote the paper: HLL EGG TPL ROG AJS HJB.