1. Developmental and Metabolic Neurology BranchNational Institute of Neurological and Communicative Disorders and StrokeNational Institutes of HealthBethesdaMaryland20892USA
2. Laboratory of Experimental AtherosclerosisNational Heart, Lung, and Blood InstituteNational Institutes of HealthBethesdaMaryland20892USA
3. Human Genetics BranchNational Institute of Child Health and Human DevelopmentNational Institutes of HealthBethesdaMaryland20892USA
4. Neurological ServiceVeterans Administration Medical CenterNewingtonConnecticut06111USA
5. Laboratoire de Biochimie, INSERM U 189Faculté de Medecine Lyon‐SudBP 12F‐69921Oullins CedexFrance