1. CDC (2022) Chronic Diseases. https://www.cdc.gov/chronicdisease/about/index.htm
2. World Economic Forum (2017) Multiple Chronic Conditions: A Growing Global Issue. https://www.weforum.org/agenda/2017/12/healthcare-future-multiple-chronic-disease-ncd
3. The Global Burden of Chronic Diseases
4. World Health Organization (2019) Non-Communicable Diseases: Key Facts.https://www.who.int/news-room/fact-sheets/detail/noncommunicable-diseases
5. National Center for Chronic Disease Prevention and Promotion (2022) Chronic Diseases. https://www.cdc.gov/chronicdisease/resources/infographic/chronic-diseases.htm