Risk of Transmission of Bovine Spongiform Encephalopathy to Humans in the United States, Report of the Council on Scientific Affairs
JAMA 281:2330-2339, Tan,L.,et al, 1999
A Population-Based Study of Dementia in 85-Year-Olds
NEJM 328:153-158, 203-2051993., Skoog,I.,et al, 1993