Fig. 4From: Clinical efficiency of bone marrow mesenchymal stem cell implantation for osteonecrosis of the femoral head: a matched pair control study with simple core decompressionFemoral head survival rates of CD and CD + BMMSC groups according to the Kaplan–Meier method. The difference between the two groups was statistically significant (log-rank test, p = 0.031)Back to article page