1. Institute of Biomedicine/Medical Biochemistry (S.K., T.J., M.M.R., H.M., J.J.P.), University of Kuopio, FI-70211 Kuopio, Finland
2. Biomedicum Helsinki (U.K.), Institute of Biomedicine, University of Helsinki, FI-00014 Helsinki, Finland
3. Departments of Microbiology (D.G.), Charlottesville, Virginia 22908
4. Biochemistry and Molecular Genetics (B.M.P.), University of Virginia Health System, Charlottesville, Virginia 22908