References:

National Research Council (US) and Institute of Medicine (US) Committee on Depression, P. P., England, M. J., & Sim, L. J. (2009). Introduction and Magnitude of the Problem. Inwww.ncbi.nlm.nih.gov. National Academies Press (US). https://www.ncbi.nlm.nih.gov/books/NBK215116/

Torres, F. (2020, October).What is depression?American Psychiatric Association. https://www.psychiatry.org/patients-families/depression/what-is-depression

World Health Organization. (2019).Depression. World Health Organization. https://www.who.int/health-topics/depression#tab=tab_1

1. What is the size and magnitude of depression?
2. What is the scope and size of the problem as it relates to depression?

Any other references appreciated