{"groups":[{"description":"Participants who consented to undergo transoral robotic-assisted surgery using the da Vinci® Robotic System","id":"FG000","title":"TORS Candidates"}],"periods":[{"dropWithdraws":[{"reasons":[{"groupId":"FG000","numSubjects":"23"}],"type":"robot surgery aborted in OR"}],"milestones":[{"achievements":[{"groupId":"FG000","numSubjects":"170"}],"type":"STARTED"},{"achievements":[{"groupId":"FG000","numSubjects":"147"}],"type":"COMPLETED"},{"achievements":[{"groupId":"FG000","numSubjects":"23"}],"type":"NOT COMPLETED"}],"title":"Overall Study"}]}