Consort diagram. Of 113 patients registered, 13 had to be excluded because of ineligibility (no CLL, 2; Richter's transformation, n = 1; no informed consent, n = 3; comorbidity precluding eligibility as per protocol, n = 3; registration after alloSCT, n = 4), leaving 100 patients evaluable for analysis. Ten patients did not proceed to alloSCT because they lacked a donor (n = 4), died from progressive disease or developed Richter transformation before alloSCT (n = 4), or refused alloSCT (n = 2).