WASHINGTON (Reuters) - U.S. regulators have found no evidence Roche AG's anti-flu drug Tamiflu caused the deaths of children in Japan, a U.S. Food and Drug Administration spokeswoman said on Friday. U.S. regulators have been studying reports of the deaths of 12 children in Japan as well as other cases of possible side effects in people who had taken Roche's flu-fighting drug, which is in high demand as a defense against a possible avian flu pandemic in people
