Dose-response effects of hGM-CSF on numbers of constituent cells (A) and hematopoietic progenitors assayed by methylcellulose clonal culture (B) in BM of Tg-mice. Abbreviations: E, erythroblasts or erythrocyte colonies; G, granulocytes or granulocyte colonies; M, monocytes/macrophages or macrophage colonies; Eo, eosinophiles; Ly, lymphocytes; MK, megakaryocytes; BFU-E, erythroid bursts; Bl, blast cell colonies; and Mix, mixed hematopoietic colonies.