Opportunities and challenges for real-world studies on chronic inflammatory joint diseases through data enrichment and collaboration between national registers: the Nordic example
Katerina Chatzidionysiou, Merete Lund Hetland, Thomas Frisell, Daniela Di Giuseppe, Karin Hellgren, Bente Glintborg, Dan Nordström, Kalle Aaltonen, Minna RK Törmänen, Eirik Klami Kristianslund, Tore K Kvien, Sella A Provan, Bjorn Guðbjörnsson, Lene Dreyer, Lars Erik Kristensen, Tanja Schjødt Jørgensen, Lennart Jacobsson, Johan Askling
RMD Open May 2018, 4 (1) e000655; DOI: 10.1136/rmdopen-2018-000655