[1] Neurol Res Ctr Inc, Alzheimers Diagnost & Treatment Ctr, Bennington, VT 05201 USA
[2] Harvard Univ, Sch Med, Beth Israel Deaconess Med Ctr, Dept Neurol, Boston, MA USA
[3] Univ Texas, Hlth Sci Ctr, Dept Psychiat, San Antonio, TX 78284 USA
[4] Audie L Murphy Mem Vet Affairs Hosp, San Antonio, TX USA
[5] Buffalo Vet Affairs Hosp, Dept Neurol, Buffalo, NY USA
[6] Indiana Univ, Sch Med, Dept Neurol, Indianapolis, IN 46202 USA
[7] Williams Coll, Dept Math, Williamstown, MA 01267 USA
[8] CHU Lille, Neurol Clin, EA 2691, F-59037 Lille, France