CSF3 and graft versus host disease: Granulocyte colony-stimulating factor (G-CSF)-mobilized peripheral blood stem cells (G-PBSC) has replaced bone marrow (BM) as the most commonly used source of hematopoietic stem cells (HSCs) because of faster engraftment and practicability as well as acceptable graft-versus-host disease (GVHD) [1].