Stewart, K. A. ​, Navarro, S. M., Kambala, S., Tan, G., Poondla, R., Lederman, S., … Lavy, C. (2020). Trends in Ultrasound Use in Low and Middle Income Countries: A Systematic Review. International Journal of Maternal and Child Health and AIDS, 9(1), 103–120. https://doi.org/10.21106/ijma.294