The rat findings have been replicated many times and extended to creatures ranging from yeast to fruit flies, worms, fish, spiders, mice and hamsters.

小白鼠身上的试验已经被重复了很多次，并且范围也扩大到了各种生物，如酵母、果蝇、蠕虫、 鱼、蜘蛛、老鼠、仓鼠等。