title: Heterogeneity of B cell growth and differentiation factors.
mesh_terms: D001402:B-Lymphocytes / Q000166:cytology / Q000276:immunology; D002454:Cell Differentiation; D002478:Cells, Cultured; D006133:Growth Substances / Q000032:analysis*; D006801:Humans; D006825:Hybridomas / Q000276:immunology; D015847:Interleukin-4; D008213:Lymphocyte Activation; D008222:Lymphokines / Q000032:analysis*
chemical_list: D006133:Growth Substances; D008222:Lymphokines; D015847:Interleukin-4