title: Letter: Deletion of chromosome 7 in polycythaemia vera.
mesh_terms: D001854:Bone Marrow Cells; D002869:Chromosome Aberrations; D002906:Chromosomes, Human, 6-12 and X; D006801:Humans; D007621:Karyotyping; D008297:Male; D008875:Middle Aged; D011087:Polycythemia Vera / Q000235:genetics*