{"groups":[{"description":"HLA Haploidentical Natural Killer Cell Infusion for Treatment of Relapsed or Persistent Leukemia","id":"FG000","title":"HLA Haploidentical Natural Killer Cell Infusion"}],"periods":[{"milestones":[{"achievements":[{"groupId":"FG000","numSubjects":"6"}],"type":"STARTED"},{"achievements":[{"groupId":"FG000","numSubjects":"6"}],"type":"COMPLETED"},{"achievements":[{"groupId":"FG000","numSubjects":"0"}],"type":"NOT COMPLETED"}],"title":"Overall Study"}]}