Post hoc analysis 2 phase III RCTs of abatacept (Sc & IV) in 409 polyarticular JIA pcJIA. ABA was effective (by JIA-ACR and JADAS27 responses) & well tolerated, regardless of concomitant or prior MTX use. https://t.co/cTn52V5Fuu https://t.co/CUqin00LZh