For instance, ERIC cooperates with GenQA/UK NEQAS-LI to assure the quality of TP53 testing in patients with CLL: ERIC TP53 Certification ensures the initial control of the method implementation, including the detection of low-VAF TP53 variants (http://www.ericll.org/), while GenQA/UK NEQAS-LI supports the continuous quality check. Here, TP53 is linked to B-cell chronic lymphocytic leukemia.