{"groups":[{"description":"Ibrutinib 420 mg daily.","id":"FG000","title":"Ibrutinib"},{"description":"Chlorambucil 0.5 mg/kg (to maximum 0.8 mg/kg) days 1 and 15 of 28-day cycle up to 12 cycles","id":"FG001","title":"Chlorambucil"}],"periods":[{"milestones":[{"achievements":[{"groupId":"FG000","numSubjects":"136"},{"groupId":"FG001","numSubjects":"133"}],"type":"STARTED"},{"achievements":[{"comment":"Participants who were still on study or died at study closure","groupId":"FG000","numSubjects":"134"},{"comment":"Participants who were still on study or died at study closure","groupId":"FG001","numSubjects":"126"}],"type":"COMPLETED"},{"achievements":[{"groupId":"FG000","numSubjects":"2"},{"groupId":"FG001","numSubjects":"7"}],"type":"NOT COMPLETED"}],"title":"Overall Study"}]}