A new study led by Hengxiang Wang (Medical Center of Air Forces), Yanhua Li (Beijing Institute of Radiation Medicine), and Xuetao Pei (Institute of Health Service and Transfusion Medicine, Beijing, China) describes a novel function of recombinant human thrombopoietin (TPO) in increasing hematopoietic stem and progenitor cell (HSPC) homing to the bone marrow, which subsequently results in enhan