Comment on “Early Efficacy of Intra-Articular HYADD® 4 (Hymovis®) Injections for Symptomatic Knee Osteoarthritis” - Santilli, Valter; Mangone, Massimiliano; Paoloni, Marco; Agostini, Francesco; Alviti, Federica; Bernetti, Andrea (Joints, 2018)