Holder J, Warren A C
Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.
J Neuropsychiatry Clin Neurosci. 1998 Winter;10(1):100-2. doi: 10.1176/jnp.10.1.100.
The authors examined the prevalence of Alzheimer's disease and apolipoprotein E allele frequencies in the Old Order Amish. A lower frequency of dementia in the Amish does not appear to be due to a reduced E4 frequency.
