1. Axelrad AA, McLeod DL, Shreeve MM, Heath DA (1974) Properties of cells that produce erythrocytic colonies in vitro. In: Robinson (ed) Hemopoiesis in culture. US Government Printing Office, Washington DC, p 226
2. Boyum A (1968) Separation of leukocytes from blood and bone marrow. Scand J Clin Lab Invest 21: 7
3. Brockbank KGM (1981) Proliferative effect of burst-promoting activity upon early erythroid progenitors. Biomedicine 34: 184
4. Clarke BJ, Housman D (1977) Characterization of an erythroid precursor cell of high proliferative capacity in normal human peripheral blood. Proc Natl Acad Sci USA 74: 1105
5. Clarke BJ, Nathan D, Alter B, Housman D (1976) Characterization of the burstforming erythroid stem cell (BFU-E) in peripheral blood mononuclear cells (PB-MNC) of normal individuals and Blackfan-Diamond syndrome (BD). Blood 48: 980