ENTPD1 and colorectal carcinoma: To estimate the correlation between ADK and the CD39+/CD73+ T cell frequency,we analyzed the possible relationships between the mRNA levels forADK the gene and its isoforms ADK-L andADK-S and the frequency of CD39/CD73-expressing T cells in theperipheral blood of CRC patients: no statistically significant correlationswere found (Table 4).