ABC News: Doctors: Yushchenko Poisoned With Dioxin: " Dioxin poisoning caused the mysterious illness of Ukrainian presidential candidate Viktor Yushchenko, doctors said Saturday.

Tests run over the past 24 hours provided conclusive evidence of the poisoning, Dr. Michael Zimpfer, director of Vienna's private Rudolfinerhaus clinic said.

'There is no doubt about the fact that Mr. Yushchenko's disease has been caused by a case of poisoning by dioxin,' Zimpfer said."