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In their correspondence, Cantini and Benucci1 express their concern about the lack of real-life data supporting the switch from originator to biosimilar biological disease-modifying antirheumatic drugs, as recommended in the recently issued consensus-based recommendations.2 They argue that the Danish Nationwide Biologic (DANBIO) registry reporting real-life data showed a lower than expected retention rate after the switch to biosimilar infliximab (bio-IFX) and etanercept.3 4
Concerning bio-IFX, several other real-life studies have been published so far. One Dutch and one French open studies have examined real-life outcomes of the switch from originator to bio-IFX in patients with inflammatory rheumatic diseases.5 6 Both …
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