References for "Smoking increases later risk of dementia"
Centers for Disease Control and Prevention. "Health Effects of Cigarette Smoking," fact sheet updated Sept. 15, 2010.
Kivipelto M, et al. "Apolipoprotein E Epsilon4 Magnifies Lifestyle Risks for Dementia: A Population-Based Study," Journal of Cellular and Molecular Medicine (Dec. 2008): Vol. 12, No. 6B, pp. 2762–71. www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=18318693