[1] INDIANA UNIV, SCH MED, DEPT PATHOL & LAB MED, INDIANAPOLIS, IN 46202 USA
[2] INDIANA UNIV, SCH MED, DEPT MED & MOLEC GENET, INDIANAPOLIS, IN 46202 USA
[3] INDIANA UNIV, SCH MED, DEPT NEUROL, INDIANAPOLIS, IN 46202 USA
[4] NYU, MED CTR, DEPT PATHOL, MICHAEL HEIDELBERGER DIV IMMUNOL, NEW YORK, NY 10016 USA
[5] IST NAZL NEUROL CARLO BESTA, I-20133 MILAN, ITALY