RT Journal Article SR Electronic A1 Rizzo, Toni T1 Study Confirms Biosimilarity of HD203 and Etanercept in Patients with RA JF MD Conference Express YR 2014 FD SAGE Publications VO 14 IS 17 SP 15 OP 16 DO 10.1177/155989771417007 UL http://mdc.sagepub.com/content/14/17/15.abstract AB The new agent HD203 is a biosimilar of etanercept, a recombinant fusion protein that blocks tumor necrosis factor activity. The amino acid sequence of HD203 is identical to that of etanercept and is produced by the same method. The objective of the Trial to Evaluate Equivalence in Efficacy and Safety of HD203 and Enbrel in RA Patients [HERA; NCT01270997] was to evaluate the equivalence in efficacy of HD203 and etanercept in combination with methotrexate in patients with rheumatoid arthritis (RA).