Abate Michele, Pelotti Patrizia, De Amicis Daniele, Di Iorio Angelo, Galletti Stefano, and Salini Vincenzo. 2009. “Viscosupplementation With Hyaluronic Acid in Hip Osteoarthritis (a Review)”. Upsala Journal of Medical Sciences 113 (3). https://doi.org/10.3109/2000-1967-233.