1. Puri B, HallA and HoR, editors. Revision notes in psychiatry (3rd ed.). New York: CRC Press; 2013.
2. Sallim AB, Sayampanathan AA, Cuttilan A, Ho R (2015). Prevalence of Mental Health Disorders among Caregivers of Patients with Alzheimer Disease. J Am Med Dir Assoc, 16:1034-1041.
3. United Nations, Department of Economic and Social Affairs, Population Division. World Population Ageing. New York: The United Nations; 2015 (ST/ESA/SER.A/390)
4. Prince M, Comas-Herrera A, Knapp M, Guerchet M, KaragiannidouM World Alzheimer Report 2016: Improving healthcare for people living with dementia. Coverage, quality and costs now and in the future. London: Alzheimer’s Disease International (ADI); 2016.
5. Alzheimer's Association (2019). 2019 Alzheimer’s Disease Facts and figures. Alzheimers Dement, 15:321-387.