TY - GEN AU - Lipton,J M AU - Kudisch,M AU - Nathan,D G TI - Response of three classes of human erythroid progenitors to the absence of erythropoietin in vitro as a measure of progenitor maturity SN - 0301-472X PY - 1982///0222 KW - Bone Marrow Cells KW - Colony-Forming Units Assay KW - Erythrocytes KW - classification KW - Erythropoietin KW - pharmacology KW - Humans KW - Interleukin-2 KW - Time Factors N1 - Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S ER -