About the Authors

Kees L. de Visser

Affiliations Diabetes Centre, Isala, 8025 BT, Zwolle, The Netherlands, Department of General practice, University Medical Center Groningen and University of Groningen, 9700 RB, Groningen, The Netherlands, General practice Urk, 8322 BA, The Netherlands

Gijs W. D. Landman

g.w.d.landman@isala.nl

Affiliations Diabetes Centre, Isala, 8025 BT, Zwolle, The Netherlands, Department of internal medicine, Gelre hospital, 7334 DZ, Apeldoorn, The Netherlands, Langerhans Medical Research Institute, Zwolle, The Netherlands

Betty Meyboom-de Jong

Affiliations Diabetes Centre, Isala, 8025 BT, Zwolle, The Netherlands, Department of General practice, University Medical Center Groningen and University of Groningen, 9700 RB, Groningen, The Netherlands

Wim de Visser

Affiliation General practice Urk, 8322 BA, The Netherlands

Gerard J. te Meerman

Affiliation Department of genetics, University Medical Center Groningen and University of Groningen, 9700 RB, Groningen, The Netherlands

Henk J. G. Bilo

Affiliations Diabetes Centre, Isala, 8025 BT, Zwolle, The Netherlands, Department of Internal Medicine, University Medical Center Groningen and University of Groningen, 9700 RB, Groningen, The Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KLdV GWDL NK BM WdV GJtM HJGB. Performed the experiments: KLdV BM WdV GJtM HJGB. Analyzed the data: KLdV GJtM. Contributed reagents/materials/analysis tools: KLdV BM WdV GJtM HJGB. Wrote the paper: KLdV BM WdV GJtM HJGB.