1. Department for Digestive DiseasesKarolinska University HospitalStockholmSweden
2. Department of Abdominal RadiologyKarolinska University HospitalStockholmSweden
3. Department of PathologyKarolinska University HospitalStockholmSweden
4. Department of PathologyUniversity of OsloOsloNorway
5. Division of Epidemiology and BiostatisticsEuropean Institute of Oncology IRCCSMilanItaly
6. Department of Clinical ScienceIntervention, and Technology (CLINTEC)Karolinska InstituteStockholmSweden