In the donors, the median excretion rates were (pro-donation/post-donation) 10.6/7.8 μmol/24 h for CML, 8.06/6.15 μmol/24 h for CEL and 1.63/0.89 μmol/24 h for furosine. This evidence concerns the gene CEL and chronic myelogenous leukemia, BCR-ABL1 positive.