Fig. 3

Time to treatment failure. a Patients stratified by the frontline therapies in those aged between 60 and 79 years. b Patients stratified by the frontline therapies in those older than 80 years. c Patients stratified by the use of rituximab in those aged between 60 and 79 years. d Patients stratified by the use of rituximab in those older than 80 years. e Patients stratified by the use of anthracycline in those aged between 60 and 79 years. f Patients stratified by the use of anthracycline in those older than 80 years