Ferring Pharmaceuticals Inc. has presented results from the FLEXX Trial of Osteoarthritis (OA) of the Knee at the Osteoarthritis Research Society International 2008 World Congress in Rome, Italy. The results show that EUFLEXXA(R), a highly pure non-avian high molecular weight form of intra-articular hyaluronic acid, is superior to intra-articular saline for pain relief in knee OA at the end of six months. The double-blind study had enrolled 586 patients. EUFLEXXA is the first hyaluronic acid derived from non-avian that has been approved in the U.S. for knee OA pain.