Intra-articular injection of synovial mesenchymal stem cells to treat articular cartilage injury 
Yuan Xiao-long, Bi Sheng-rong, Yu Fang-yuan
Chinese Journal of Tissue Engineering Research . 2015, (36): 5892 -5897 .  DOI: 10.3969/j.issn.2095-4344.2015.36.027