Fig. 1

Schematic overview of the experimental setup. A Half of the synovial fluid was divided into aliquots while the other half was kept as a whole. The SF was treated with hyaluronidase after which it was centrifuged. Set 1 was kept as separate aliquots during the whole procedure and set 2 was divided in aliquots directly after centrifugation. B Synovial fluid was centrifuged and the pelleted cells are the “before” cells. The supernatant was treated with hyaluronidase and subsequently centrifuged. The pelleted cells are the “after” cells