London (NYT) ? Tests done at a hospital in Vienna, Austria, confirmed that Viktor A. Yushchenko, the Ukrainian opposition candidate, had been poisoned with dioxin, doctors there said Saturday, providing an explanation for a broad array of painful and disfiguring conditions that plagued him during the past three months of the presidential campaign.

There was ?no doubt? that Yushchenko’s disease ?has been caused by a case of poisoning by dioxin,? Dr. Michael Zimpfer, president of the Rudolfinerhaus Hospital said at a news conference on Saturday. He said that Yushchenko’s blood dioxin level was ?more than 1,000 times ?the upper limits of normal and that his initial severe abdominal pain suggested that he had eaten the poison.

Ukraine’s prosecutor general, Gennady A. Vasiliyev, had conducted an investigation but closed it, saying there was no evidence of poisoning.

No, none at all …