1. Bullain SS, Corrada MM. Dementia in the oldest old. Continuum (Minneap Minn). 2013;19:457–69. https://doi.org/10.1212/01.CON.0000429172.27815.3f .
2. Rivoirard R, Chargari C, Trone J-C, Falk AT, Guy J-B, Eddekaoui H, et al. General management of nonagenarian patients: a review of the literature. Swiss Med Wkly. 2014;144:w14059.
3. United Nations, Department of Economic and Social Affairs, Population Division, Population Estimates and Projections Section. World Population Prospects, the 2012 Revision. Population by Age Groups- Both Sexes. Medium-fertility variant, 2010–2100. n.d. http://esa.un.org/wpp/ExcelData/population.htm (accessed May 11, 2015).
4. Corrada M, Brookmeyer R, Berlau D, Paganini-Holl A, Kawas C. Prevalence of dementia after age 90 results from the 90+ study. Neurology. 2008;71:337–44.
5. Brookmeyer R, Johnson E, Ziegler-Graham K, Arrighi HM. Forecasting the global burden of Alzheimer’s disease. Alzheimers Dement. 2007;3:186–91. https://doi.org/10.1016/j.jalz.2007.04.381 .