| Affiliation: | 1. Upper Gastrointestinal Surgery, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden;2. Section of Gastrointestinal Cancer, Division of Cancer Studies, King's College London, London, United Kingdom;3. Stockholm University Demography Unit, Department of Sociology, Stockholm University, Stockholm, Sweden;4. Unit of Epidemiology, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden;5. Swedish Institute for Social Research, Stockholm University, Stockholm, Sweden |
