cll life expectancycll leukemia life expectancyaggressive cll life expectancylife expectancy of cll patientsstage 3 cll life expectancycll 17p deletion life expectancychronic leukemia life expectancystage 3 leukemia life expectancyaverage life expectancy with cllsymptoms of cll cancercll sll life expectancymyeloma cancer life expectancy