tokens: The clonality of mature peripheral blood-derived myeloid and lymphoid cells and bone marrow haemopoietic progenitors from 18 females with myelodysplasia ( MDS ) ( five refractory anaemia , RA ; one RA with ringed sideroblasts , RARS ; three chronic myelomonocytic leukaemia , CMML ; four RA with excess of blasts , RAEB ; five RAEB in transformation , RAEB-t ) was studied by X-chromosome inactivation analysis .