Differentially expressed miRNAs are associated with prognosis in MM patients. Significant differential distribution of each indicated miRNA among subgroups of MM patients with differential clinical-prognostic features according to ISS (I vs II/III; I_n = 4; II_n = 8; III_n = 3). Mean values were compared using Mann-Whitney U rank sum test; bars indicate SEs. P value for each miRNA is indicated.