About the Authors

Antje Timmer

antje.timmer@uni-oldenburg.de

Affiliations Division of Epidemiology and Biometry, Department of Health Services Research, Medical Faculty, Carl von Ossietzky University, Oldenburg, Germany, Department of Clinical Epidemiology, Leibniz Institute for Prevention Research and Epidemiology – BIPS GmbH, Bremen, Germany

Jenny Peplies

Affiliations Department of Clinical Epidemiology, Leibniz Institute for Prevention Research and Epidemiology – BIPS GmbH, Bremen, Germany, Institute for Public Health & Nursing Research IPP, Faculty of Human and Health Sciences, Bremen, Germany

Max Westphal

Affiliation Department of Clinical Epidemiology, Leibniz Institute for Prevention Research and Epidemiology – BIPS GmbH, Bremen, Germany

Birgit Kaltz

Affiliation German Crohn’s Disease and Ulcerative Colitis association (registered association), Berlin, Germany

Antje Ballauff

Affiliation Center for Children’s and Adolescent Medicine, Krefeld, Germany

Martin Claßen

Affiliation Childrens Hospital, Klinikum “Links der Weser“, Bremen, Germany

Martin W. Laass

Affiliation Children’s Hospital, Medical Faculty Carl Gustav Carus, Technical University, Dresden, Germany

Sibylle Koletzko

Affiliation Division of Pediatric Gastroenterology and Hepatology, Dr. von Hauner Children’s Hospital, Ludwig Maximilian University, Munich, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: AT BK MC MWL SK JP. Data curation: AT MW JP. Formal analysis: AT MW. Funding acquisition: AT. Investigation: AT JP AB MC MWL SK. Methodology: AT MW JP. Project administration: AT JP. Resources: AT AB MC MWL SK. Software: MW. Supervision: AT SK. Validation: AT JP. Visualization: AT MW JP. Writing – original draft: AT MW. Writing – review & editing: AT JP MW BK AB MC MWL SK.