CLEVELAND, Feb. 16, 2010 (GLOBE NEWSWIRE) -- Athersys, Inc. (Nasdaq:ATHX - News) today announced that it has completed patient enrollment for its phase I clinical trial of MultiStem®, its allogeneic stem cell therapy product, administered to individuals following acute myocardial infarction (AMI), more commonly referred to as a heart attack. Top line results of the trial are expected to be announced midyear, upon completion of the four-month patient follow-up visits and analysis of results.