About the Authors

Rickard Ljung

rickard.ljung@ki.se

Affiliation Unit of Upper Gastrointestinal Research, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden

Sven Drefahl

Affiliation Stockholm University SIMSAM Node for Demographic Research, Department of Sociology, Stockholm University, Stockholm, Sweden

Gunnar Andersson

Affiliation Stockholm University SIMSAM Node for Demographic Research, Department of Sociology, Stockholm University, Stockholm, Sweden

Jesper Lagergren

Affiliations Unit of Upper Gastrointestinal Research, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden, Division of Cancer Studies, Kinǵs College London, London, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Critically revised the manuscript and have approved the final version: RL SD GA JL. Conceived and designed the experiments: RL SD GA JL. Analyzed the data: SD. Contributed reagents/materials/analysis tools: GA. Wrote the paper: RL.