1. UN Data. Population. Available at: https://data.un.org/Search.aspx?q=population [Access date: 6 April 2020]
2. Okkels N, Kristiansen CB, Munk-Jorgensen P, Sartorius N: Urban mental health: challenges and perspectives. Curr Opin Psychiatry 2018, 31(3):258–264.
3. United Nations General Assembly: Draft outcome document of the United Nations Conference on Housing and Sustainable Urban Development (Habitat III). In 2016: http://habitat3.org/wp-content/uploads/NUA-English.pdf [Access date: 6 April 2020].
4. United Nations Department of Economic and Social Affairs: World Urbanization Prospects. The 2018 Revision. Available at: https://population.un.org/wup/ Publications/Files/WUP2018-Report.pdf [Access date: 6 April 2020]. In. New York, NY.; 2019.
5. Li X, Song J, Lin T, Dixon J, Zhang G, Ye H: Urbanization and health in China, thinking at the national, local and individual levels. Environ Health 2016, 15Suppl 1:32.