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buy ribavirin "We've found that males induce the expression of a large number of genes involved in sensation and signaling in hermaphrodites," said study lead author Anne Brunet, PhD, associate professor of genetics. "This raises the possibility that the male-induced demise is not just due to the physical stress of copulation but instead involves some degree of active signaling. Indeed, we found that just placing hermaphrodites on plates where males had previously been present was sufficient to induce the premature demise of hermaphrodites."