EPO mRNA (amol per microgram of total RN) in the liver, kidney, spleen, and bone marrow tissue samples. Data are presented as boxplots with the median and the 25th and 75th percentile defining the box. The error bars indicate the 10th and 90th percentile, respectively. Single data points (•) with their respective values that lie outside the 10th and 90th percentile are also shown. Additional values (not shown) were for the liver 218, 45, and 19 amol/μg total RNA and for the kidneys 731 and 290 amol/μg total RNA.