Comparison of bone marrow mesenchymal stem cells with bone marrow-derived mononuclear cells for treatment of diabetic critical limb ischemia and foot ulcer: a double-blind, randomized, controlled trial - Lu, D; Chen, B; Liang, Z; Deng, W; Jiang, Y; Li, S; Xu, J; Wu, Q; Zhang, Z; Xie, B; Chen, S (Diabetes Res Clin Pract, 2011)