Tai Chi is Effective in Treating Knee Osteoarthritis: A Randomized Controlled Trial
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3023169/
Tai Chi is Effective in Treating Knee Osteoarthritis: A Randomized Controlled Trial
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3023169/