[1] PETER BENT BRIGHAM HOSP, DEPT MED, NEUROL SECT, BOSTON, MA 02115 USA
[2] PETER BENT BRIGHAM HOSP, DEPT PATHOL, SECT NEUROPATHOL, BOSTON, MA 02115 USA
[3] HARVARD UNIV, SCH MED, DEPT NEUROL, BOSTON, MA 02115 USA
[4] HARVARD UNIV, SCH MED, DEPT PATHOL, BOSTON, MA 02115 USA