There was a trial somewhere in central/eastern Europe on inosine -- is the group who wrote this paper the group that did the trial?
No they are not connected as far as I know. Szabo et al. have published several reports regarding inosine and autoimmunity (pubmed search with "Szabo[auth] inosine" should render some interesting hits). The Yugoslavian group you are referring to, led by Dr. Gordana Toncev, have so far presented results focusing on the inosine-uric acid-antioxidant trail.
The latest trial by the yugoslavians was highlighted by the NMSS
Gordana Toncev, MD (Clinical Hospital Center Kragujevac, Yugoslavia) and colleagues studied the effectiveness of inosine in secondary-progressive and relapsing-remitting MS. They administered oral inosine to 32 people daily for 24 months, and compared the results to 32 untreated controls. People treated with inosine had no adverse effects, lower rates of MS relapses, and lower scores on the EDSS, a measure of disease activity (Abstract #P06.091, American Academy of Neurology [AAN] Annual Meeting, 2004). Further study is needed to confirm these early results.
Sofar we have only seen the poster presentation, but the final report is to be published during 2005. It will be very interesting to read, especially when similiar studies are still missing. An american study at the University of Pennsylvania have had problems recruiting patients(!) and is still not finished though it was planned to have finished in 2004.