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Correspondence response
Response to: ‘Lower anti-drug antibodies with etanercept biosimilar: Can Ctrough explain the differences’ by Shah
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We appreciate Shah1 for the interest in and comments on the SB4 phase III study publication and subsequent correspondences regarding immunogenicity results.2–4
The immunogenicity results in the SB4 phase III study2 (0.7% in SB4 and 13.1% in reference etanercept (ETN)) was concluded by the Committee for Medicinal Products for Human Use to be uncertain because of the low drug tolerance of the anti-drug antibody (ADA) assay that led to a low sensitivity …