Carbamylated erythropoietin 4 Erythropoietin 4 Humans 4 cell cycle progression 4 cell proliferation 4 controlled study 4 erythropoietin 4 human 4 human cell 4 unclassified drug 4 Apoptosis 3 Cell Differentiation 3 Cell Growth Processes 3 Cell Line, Tumor 3 Cell cycle 3 Cell proliferation 3 Cyclin-Dependent Kinase Inhibitor p27 3 Erythroid Cells 3 Erythropoiesis 3 FOXO3a 3 Forkhead Transcription Factors 3 G1 Phase 3 Neurons 3 P27kip1 3 Phosphorylation 3 Receptors, Erythropoietin 3 S Phase 3 Signal Transduction 3 apoptosis 3 article 3