“…The reasons for the disparities among these studies may be multifactorial. They were all performed in animal models using a wide variety of species including monkeys [26,27], pigs [22,23,43], rabbits [8,20,29], guinea pigs [8,9], hamsters [8,9], rats [8,9,13], mice [24,35,50], and chickens [52]. Therefore, species differences may have contributed significantly to differences in outcome.…”