KIEV (Reuters) - Liberal candidate Viktor Yushchenko expressed unease on Wednesday at the effects of dioxin poisoning on his pocked face, but said he was fit to be president and predicted voters would hand him a landslide victory. Yushchenko, who takes on Prime Minister Viktor Yanukovich in a Dec. 26 re-run of last month's rigged presidential poll, says authorities poisoned him in a murder attempt. Austrian doctors last week detected dioxin in him 1,000 times the normal level.