About the Authors

Grit Sommer

Affiliation Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland

Micol E. Gianinazzi

Affiliation Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland

Rahel Kuonen

Affiliation Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland

Julia Bohlius

Affiliation Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland

Dagmar l’Allemand

Affiliation Clinic of Adolescent Medicine, Division of Paediatric Endocrinology and Diabetology, Ostschweizer Kinderspital, St. Gallen, Switzerland

Michael Hauschild

Affiliation Division of Paediatric Endocrinology, Diabetology and Obesity, Department of Paediatrics, University Hospital, Lausanne, Switzerland

Primus-Eugen Mullis

Affiliation Division of Paediatric Endocrinology, Diabetology & Metabolism, University Children’s Hospital Bern, Inselspital, Bern, Switzerland

Claudia E. Kuehni

claudia.kuehni@ispm.unibe.ch

Affiliation Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland

Swiss Society for Paediatric Endocrinology and Diabetology (SGPED)

Members of the Swiss Society for Paediatric Endocrinology and Diabetology (SGPED) who contributed to this study along with a contact person are listed in the Acknowledgments.

Competing Interests

This work has been funded by the Swiss Cancer League (KLS-02586-02-2010; KLS-2948-02-2012), the 7th framework program of the European Union, Grant Agreement Number HEALTH-F2-2009-223497 (SAGhE), Pfizer AG, Novo Nordisk Pharma AG, and Sandoz Pharmaceuticals AG to PEM. The latter (Pfizer AG, Novo Nordisk Pharma AG, and Sandoz Pharmaceuticals AG)had no influence on the conduction of the study. The commercial funders played no role in any steps of the project: Study design, collection, analysis, and interpretation of data, writing of the paper, and/or decision to submit for publication was not influenced by any funder. Also, the funders do not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: CEK PEM GS JB. Performed the experiments: GS RK PEM MH DL. Analyzed the data: GS MEG. Wrote the paper: GS MEG RK JB DL MH PEM CEK.