 Activity @-@ related bone fractures have been documented in ceratopsians . Periostitis has also been documented in the shoulder blade of a ceratopsian . 
 Activity @-@ related bone fractures <a href='been_done' title='1'><mark>have</mark></a> been documented in ceratopsians . Periostitis <a href='been_done' title='2'><mark>has</mark></a> also been documented in the shoulder blade of a ceratopsian . 
Activity @-@ related bone fractures done been documented in ceratopsians . Periostitis done also been documented in the shoulder blade of a ceratopsian .