|1||NCT00556608||Completed||Efficacy Study of Intra-articular Hyaluronic Acid in the Knee Osteoarthritis||
||381||All||40 Years to 80 Years (Adult, Older Adult)||NCT00556608||06CZIFCH/Hai06||November 2007||July 2009||May 2010||November 12, 2007||December 4, 2012||
|2||NCT00435773||Completed||Leeches for the Treatment of Knee Osteoarthritis||
||118||All||Child, Adult, Older Adult||NCT00435773||EK 102/03||February 2004||December 2004||February 15, 2007||April 9, 2007||
† Study has passed its completion date and status has not been verified in more than two years.