Correction: Reduced intensity conditioning, combined transplantation of haploidentical hematopoietic stem cells and mesenchymal stem cells in patients with severe aplastic anemia.

There is an error in the fifth sentence of the “Mesenchymal stem cells preparation and transfusion” subsection of the Materials and Methods. The correct sentence is: Transfusion recipients received the human umbilical cord-derived mesenchymal stem cells (hUC-MSC; 4 [2.87–10]×105/kg) 6 hours before transfusion of bone marrow and peripheral blood stem cells (Fig. 1).