A. Correlations between miRNAs and blood platelet count, white blood count or hemoglobin level in 154 healthy donors from the Platelet RNA and Expression 1 data set. r, Pearson correlation coefficient. B. Human umbilical cord blood derived, CD61-purified MK cultures were assessed for the expression of mature miRNAs, miR-99b-5p, let-7e-5p and miR-125a-5p by real time PCR analysis at days 6, 9 and 13. Fold changes were calculated for their expression at days 9 and 13 compared to day 6. n=3 different cords (=independent experiments).