Thanks for the ping.
One thing about dioxin poisoning, is that I don't remember ever seeing a greenish cast to a chloracne rash. In photographs--I've never seen one in person--these rashes are reddish and cause a thick, bumpy appearance in the skin. Furthermore, dioxin (the most toxic 2,3,7,8-TCDD type) has a half-life in the human body of 7 years, so if Mr. Yushchenko has been poisoned with the stuff, it will still be detectable. The same goes for other chemicals that cause the same symptoms.
As for the greenish tint, I am stumped.
Some of Mr. Yushchenko's other symptoms are not consistent with dioxin poisoning.
I certainly hope Mr. Yushchenko finds an answer to his illness! It must be so terrible to not know what is going on!
http://www.timesonline.co.uk/article/0,,3-1373064,00.html
This article says that a dioxin can cause chloracne which has the green tinge.
Re the previous article:
"The Austria Press Agency reported that the clinic had called in outside help from "a specialist in military operations and biological weapons" and his medical files had been sealed and turned over to Austrian prosecutors."
This sounds like they think he was poisoned.