GUS causes ⬇️ in serum collagen C1M (marker of joint response), C3M, C4M, C6M. Pts achieving ACR20 at week 24 had greater C1M reduction than non-responder. Abstract #POS1036 #EULAR2021 @RheumNow https://t.co/4JqbaMexuR https://t.co/gXltKn6qIc