twelve out of 51 patients with idiopathic myelofibrosis ( im ) showed such a feature ( 23.5 % ) , versus two out of 100 with ph1-positive chronic myeloid leukaemia , two of 32 with polycythaemia vera , and one of 17 with essential thrombocythaemia , the difference between im and the remaining mpd being statistically significant ( p less than 0.0001 ) .
C0001815
im
C0027022
mpd