1. From the Institute for Biomedical Aging Research, Austrian Academy of Sciences, Innsbruck (Q.X., M.M., G.W.); the Department of Internal Medicine, University Hospital of Vienna (G.S.), Vienna, Austria; the Department of Neurology (J.W., S.K.), Institute for General and Experimental Pathology (H.P., G.W.), University of Innsbruck, Medical School, Innsbruck, Austria; and the Department of Internal Medicine, Hospital of Bruneck, Italy (G.E., F.O.).