Yuan, H.- feng, Zhang, J., Guo, C.- an, & Yan, Z.- qin. (2016). Clinical outcomes of osteonecrosis of the femoral head after autologous bone marrow stem cell implantation: a meta-analysis of seven case-control studies . Clinics, 71(2), 110-113. https://doi.org/10.6061/clinics/2016(02)10