Two cycles of plasma rich in growth factors (PRGF-Endoret) intra-articular injections improve stiffness and activities of daily living but not pain compared to one cycle on patients with symptomatic knee osteoarthritis

1. Vaquerizo, V.
2. Padilla, S.
3. Aguirre, J.J.
4. Begoña, L.
5. Orive, G.
6. Anitua, E.