DUBLIN--(BUSINESS WIRE)--Research and Markets (http://www.researchandmarkets.com/research/x8c67m/us_market_for) has announced the addition of the "US Market for Hyaluronic Acid Viscosupplementation 2011-2021" report to their offering. Viscosupplementation products are approved for direct injection into the knee to relieve pain caused by osteoarthritis. Though the active mechanism is not completely understood, the intention is to restore the shock absorbing nature of the joint fluid. Although th