1. Department of Digestive DiseasesKarolinska University Hospital and Karolinska InstituteStockholmSweden
2. Department of GastroenterologySão João University HospitalPortoPortugal
3. Department of Biomedical Sciences and MedicineUniversity of AlgarveFaroPortugal
4. Department of PathologySão João University HospitalPortoPortugal
5. Institute of Molecular Pathology and ImmunologyUniversity of PortoPortoPortugal