K. Singh​, Gopal, Mohammad Siahpush, Romuladus E. Azuine, and Shanita D. Williams. 2015. “Widening Socioeconomic and Racial Disparities in Cardiovascular Disease Mortality in the United States, 1969-2013”. International Journal of Maternal and Child Health and AIDS 3 (2):106-18. https://doi.org/10.21106/ijma.44.