1. NCCDPHP. About chronic diseases: National Center for Chronic Disease Prevention and Health Promotion (NCCDPHP); 2019 [updated 23rd of October 2019]. Available from: https://www.cdc.gov/chronicdisease/about/index.htm.
2. McComb B. Talking about poverty: What is the definition of Global Poverty?: The Borgen Project; 2016 [cited 2019 7th of November]. Available from: https://borgenproject.org/definition-of-global-poverty/.
3. Ministry of Health, Nutrition and Indigenous Medicine. Sri Lanka essential health services packages. Ministery of Health, Nutrition and Indigenous Medicine, 2019.