Christian R. Geest, Fried J. Zwartkruis, Edo Vellenga, Paul J. Coffer, Miranda Buitenhuis. Mammalian target of rapamycin activity is required for expansion of CD34+ hematopoietic progenitor cells. Haematologica 2009;94(7):901-910; https://doi.org/10.3324/haematol.13766.