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Cycle 1: IV rituximab 375 mg/m\\^2 on Day 0 Cycles 2-6: IV rituximab 500 mg/m\\^2 on Day 1 Cycles 1-6: IV fludarabine 25 mg/m\\^2 on Days 1-3 (or as an oral dose of 24 mg/m\\^2 on Days 1-5 or 30-40 mg/m\\^2 on Days 1-3), and IV cyclophosphamide 250 mg/m\\^2 on Days 1-3 (or as an oral dose of 150 mg/m\\^2 on Days 1-5 or 200-250 mg/m\\^2 on Days 1-3).","id":"OG000","title":"Part 2 : Rituximab IV 500 mg/m^2"},{"description":"Participants received the following in 28-day cycles. Cycle 1: IV rituximab 375 mg/m\\^2 on Day 0 Cycles 2-6: SC rituximab 1600 mg on Day 1 Cycles 1-6: IV fludarabine 25 mg/m\\^2 on Days 1-3 (or as an oral dose of 24 mg/m\\^2 on Days 1-5 or 30-40 mg/m\\^2 on Days 1-3), and IV cyclophosphamide 250 mg/m\\^2 on Days 1-3 (or as an oral dose of 150 mg/m\\^2 on Days 1-5 or 200-250 mg/m\\^2 on Days 1-3).","id":"OG001","title":"Part 2: Rituximab SC 1600 mg"}],"paramType":"MEDIAN","populationDescription":"Part 2 SAP; n = number of participants analyzed at the specified visit.","reportingStatus":"POSTED","timeFrame":"Cycle 1 pre-dose, 60 minutes post-dose, Days 2 and 3 in Cycle 2, day 1 pre-dose in Cycles 3, 4, 5 and 6, Follow-up Days 28 and 56, and Follow-up Visits at Months 3, 6, 9, 12, 15, and 18 and Withdrawal Visit","title":"Part 2: Total CD19+ B-Cell Counts by Visit","type":"SECONDARY","unitOfMeasure":"cells/μL"}