About the Authors

Eva B. Ostenfeld

eos@dce.au.dk

Affiliations Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus N, Denmark, Department of Gastrointestinal Surgery, Aalborg University Hospital, Aalborg, Denmark

Rune Erichsen

Affiliation Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus N, Denmark

Lars Pedersen

Affiliation Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus N, Denmark

Dóra K. Farkas

Affiliation Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus N, Denmark

Noel S. Weiss

Affiliations Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus N, Denmark, Department of Epidemiology, University of Washington, Seattle, Washington, United States of America

Henrik T. Sørensen

Affiliation Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus N, Denmark

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: HTS EBO RE NSW. Performed the experiments: EBO. Analyzed the data: DF. Contributed reagents/materials/analysis tools: LAP DF. Wrote the paper: EBO. Interpreted the results: EBO RE HTS NSW. Revised the manuscript for intellectual content: EBO RE HTS NSW DF.