Utilizing Health-Care Resources Wisely: Understanding the Efficacy of Our Interventions: Commentary on an article by Nattapol Tammachote, MD, MSc, et al.: "Intra-Articular, Single-Shot Hylan G-F 20 Hyaluronic Acid Injection Compared with Corticosteroid in Knee Osteoarthritis. A Double-Blind, Randomized Controlled Trial"