Study: NCT02596971

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Atezolizumab
Description: Atezo-G-Benda: Atezolizumab 840 milligrams (mg) intravenously (IV) on Days 1 and 15 of Cycles 2-6, during induction treatment, followed by 840 mg IV on Days 1 and 2 of each month, starting with Month 1, during maintenance treatment. Atezo-G-CHOP: Atezolizumab 1200 mg IV on Day 1 Cycles 2-6, during induction treatment, followed by 840 mg IV on Days 1 and 2 of each month, starting with Month 1. Atezo-R-CHOP: Atezolizumab 1200 mg IV on Day 1 Cycles 2-8, during induction treatment, followed by 1200 mg IV on Day 1 of Cycles 9-25.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Atezolizumab
Description: Atezo-G-Benda: Atezolizumab 840 milligrams (mg) intravenously (IV) on Days 1 and 15 of Cycles 2-6, during induction treatment, followed by 840 mg IV on Days 1 and 2 of each month, starting with Month 1, during maintenance treatment. Atezo-G-CHOP: Atezolizumab 1200 mg IV on Day 1 Cycles 2-6, during induction treatment, followed by 840 mg IV on Days 1 and 2 of each month, starting with Month 1. Atezo-R-CHOP: Atezolizumab 1200 mg IV on Day 1 Cycles 2-8, during induction treatment, followed by 1200 mg IV on Day 1 of Cycles 9-25.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Atezolizumab
Description: Atezo-G-Benda: Atezolizumab 840 milligrams (mg) intravenously (IV) on Days 1 and 15 of Cycles 2-6, during induction treatment, followed by 840 mg IV on Days 1 and 2 of each month, starting with Month 1, during maintenance treatment. Atezo-G-CHOP: Atezolizumab 1200 mg IV on Day 1 Cycles 2-6, during induction treatment, followed by 840 mg IV on Days 1 and 2 of each month, starting with Month 1. Atezo-R-CHOP: Atezolizumab 1200 mg IV on Day 1 Cycles 2-8, during induction treatment, followed by 1200 mg IV on Day 1 of Cycles 9-25.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Bendamustine
Description: Bendamustine will be administered at a dose of 90 milligrams per square meter (mg/m\^2) IV on Days 1 and 2 of Cycles 1-6, during induction treatment.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Cyclophosphamide
Description: Cyclophosphamide will be administered at a dose of 750 mg/m\^2 IV on Day 1 of Cycle 1-6/8, during induction treatment.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Cyclophosphamide
Description: Cyclophosphamide will be administered at a dose of 750 mg/m\^2 IV on Day 1 of Cycle 1-6/8, during induction treatment.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Doxorubicin
Description: Doxorubicin will be administered at a dose of 50 mg/m\^2 IV on Day 1 of Cycle 1-6/8, during induction treatment.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Doxorubicin
Description: Doxorubicin will be administered at a dose of 50 mg/m\^2 IV on Day 1 of Cycle 1-6/8, during induction treatment.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Obinutuzumab
Description: Atezo-G-Benda: Obinutuzumab will be administered at a dose of 1000 mg IV on Days 1, 8, and 15 of Cycle 1 and 1000 mg IV on Day 1 of Cycles 2-6, during induction treatment, followed by 1000 mg IV on Day 1 of every other month, starting with Month 1, during maintenance treatment. Atezo-G-CHOP: Obinutuzumab will be administered at a dose of 1000 mg IV on Days 1, 8, and 15 of Cycle 1 and 1000 mg IV on Day 1 of Cycles 2-6 during induction treatment, followed by 1000 mg IV on Day 1 of every other month, starting with Month 1 during maintenance treatment.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Obinutuzumab
Description: Atezo-G-Benda: Obinutuzumab will be administered at a dose of 1000 mg IV on Days 1, 8, and 15 of Cycle 1 and 1000 mg IV on Day 1 of Cycles 2-6, during induction treatment, followed by 1000 mg IV on Day 1 of every other month, starting with Month 1, during maintenance treatment. Atezo-G-CHOP: Obinutuzumab will be administered at a dose of 1000 mg IV on Days 1, 8, and 15 of Cycle 1 and 1000 mg IV on Day 1 of Cycles 2-6 during induction treatment, followed by 1000 mg IV on Day 1 of every other month, starting with Month 1 during maintenance treatment.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Prednisone
Description: Prednisone will be administered at a dose of 40 mg/m\^2 orally on Days 1-5 of Cycle 1-6/8, during induction treatment. Prednisolone may be given if prednisone is unavailable. The 40 mg/m\^2 dose of prednisone on Day 1 will be replaced by oral corticosteroids given as premedication on Day 1 of Cycle 1 (and subsequent cycles).

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Prednisone
Description: Prednisone will be administered at a dose of 40 mg/m\^2 orally on Days 1-5 of Cycle 1-6/8, during induction treatment. Prednisolone may be given if prednisone is unavailable. The 40 mg/m\^2 dose of prednisone on Day 1 will be replaced by oral corticosteroids given as premedication on Day 1 of Cycle 1 (and subsequent cycles).

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Vincristine
Description: Vincristine will be administered at a dose of 1.4 mg/m\^2 (maximum 2 mg) IV on Day 1 of Cycle 1-6/8, during induction treatment.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Vincristine
Description: Vincristine will be administered at a dose of 1.4 mg/m\^2 (maximum 2 mg) IV on Day 1 of Cycle 1-6/8, during induction treatment.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Rituximab
Description: Atezo-R-CHOP: Participants with previously untreated DLBCL will receive rituximab at a dose of 375 mg/m\^2 IV on Day 1 of Cycle 1-8, during induction treatment.