conversely , as measured by bioassay , excised aortic segments of rats , rabbits , and guinea pigs produced 135 +/- 14 , 34 +/- 4 , and less than 15 pmol of pgi2 per 10 mg of aorta per 30 min incubation in buffer , respectively ( n = 4 ) .
C0506947
aortic segments of
C0003483
aorta