18 month observational study on efficacy of intraarticular hyaluronic acid (Hylan G-F 20) injections under ultrasound guidance in hip osteoarthritis. Reumatismo [Internet]. 2006 Mar. 30 [cited 2025 Jul. 3];58(1):39-4. Available from: https://www.reumatismo.org/reuma/article/view/reumatismo.2006.39