%HoA =( ##id =>["term","parent_id","left_id", "right_id"] 1 => ["Body Regions","","",""], 2 => ["Extremities","1","",""], 3 => ["Arm","2","",""], 4 => ["Elbow","2","",""], 5 => ["Hand","2","",""], 6 => ["Fingers","5","",""], 7 => ["Thumbs","6","",""] );