The National Evaluation Team for Breast cancer screening (NETB) has been entrusted with the ongoing monitoring of the Breast cancer screening programme. The NETB annually collects regional tabulated data on invitations, participation (attendance), screen examinations, referrals, assessment and screen-detected breast cancers including tumour stage. Data on interval cancers and breast cancer incidence and therapy are obtained after linking a file of screened women to the file of the national cancer registry.