to clarify the mechanism of increased numbers of megakaryocytes in patients with essential thrombocythaemia ( et ) , we studied in vitro megakaryocytopoiesis in et and other myeloproliferative disorders , using a megakaryocytic colony assay in methylcellulose containing plasma or serum and medium conditioned by phytohaemagglutinin ( pha ) stimulated leucocytes ( pha-lcm ) .
C0032105
plasma
C0229671
serum