Common data items in seven European oesophagogastric cancer surgery registries: Towards a European Upper GI cancer audit (EURECCA Upper GI).
Seven countries (Denmark, France, Ireland, the Netherlands, Poland, Sweden, United Kingdom) collaborated to initiate a EURECCA (European Registration of Cancer Care) Upper GI project. The aim of this study was to identify a core dataset of shared items in the different data registries which can be used for future collaboration between countries.