1. Surgical Care Science; Karolinska Institutet; Stockholm Sweden
2. Upper Gastrointestinal Surgery; Department of Molecular Medicine and Surgery; Karolinska Institutet; Stockholm Sweden
3. Section of Gastrointestinal Cancer; Division of Cancer Studies; King's College London; London UK
4. Upper Gastrointestinal Surgery; Guy's and St Thomas' NHS Foundation Trust; London UK
5. Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
6. Clinical Psychology in Healthcare; Department of Public Health and Caring Sciences; Uppsala University; Uppsala Sweden