1. Department of GastroenterologyHospital Universitari Mutua TerrassaBarcelonaSpain
2. Centro de Investigación Biomédica en Red de enfermedades hepáticas y digestivas (CIBEREHD)MadridSpain
3. Sud, Oest and Rambla Primary Care CentersHospital Universitari Mutua TerrassaBarcelonaSpain
4. Cancer Plan of the Catalan GovernmentL’Hospitalet de LlobregatCataloniaSpain
5. Department of Clinical SciencesSchool of MedicineUniversitat de BarcelonaCancer EpidemiologyBellvitge Biomedical Research Institute-IDIBELLL’Hospitalet de LlobregatSpain