Multicentric Study, Three Randomized Arms (R-CVP vs R-CHOP vs R-FM),for Patients With Stage II-IV Follicular Lymphoma

Assessment of Overall Survival (OS)in patients treated with R-CVP, R-CHOP and R-FM. -Assessment of Progression Free Survival (PFS)in patients treated with R-CVP, R-CHOP - Assessment of Duration of Response (DR)in patients treated with R-CVP, R-CHOP and R-FM. - Assessment of Response Rate(RR) in patients treated with R-CVP, R-CHOP and R-FM. - Assessment of molecular Response Rate in patients treated with R-CVP, R-CHOP and R-FM. - Assessment of toxicity of R-CVP, R-CHOP, R-FM treatments.