Osteras, N., Moseng, T., Van Bodegom-Vos, L., Dziedzic, K., Ø. Andreassen, Fenstad, A., …Hagen, K. (2020). OP0321-HPR HIGHER QUALITY OF CARE AND LESS SURGERY AFTER IMPLEMENTING OSTEOARTHRITIS GUIDELINES IN PRIMARY CARE– LONG-TERM RESULTS FROM A CLUSTER RANDOMIZED CONTROLLED TRIAL.