Tarqui-Mamani, C. B., G. R. de Chiarella, H. Sanabria-Rojas, H. Altamirano, J. Vargas-Herrera, and M. Arana-Panduro. “Impact of Wheat Flour Folic Acid Fortification on Neural Tube Defects in Three Cities in Peru”. The Columbia University Journal of Global Health, vol. 6, no. 2, Dec. 2016, pp. 22-26, doi:10.7916/thejgh.v6i2.4985.