Fig. 2.
Progression-free survival according to the number of unfavorable factors.
(A) Chromosome 13 deletions (Δ13). (B) Δ13, β2m ≥ 2.5 mg/L. O/N indicates number of progressions and deaths without progression, per number of patients.P = .0005 in panel A and P < .0001 in panel B.