Micro-fracture enhanced by autologous bone marrow mesenchymal stem cells extracellular matrix scaffold to treat articular cartilage defects in the knee of pigs 
Li Xiang-quan, Tang Cheng, Song Ke-rong, Jin Cheng-zhe
Chinese Journal of Tissue Engineering Research . 2014, (43): 6907 -6913 .  DOI: 10.3969/j.issn.2095-4344.2014.43.004