H. Sanabria Rojas, C. Tarqui-Mamani, J. Arias Pachas, and N. Lam Figueroa, “Impact of fortifying wheat flour with folic acid on neural tube defects in Lima, Peru”, An Fac med, vol. 74, no. 3, pp. 175–180, Sep. 2013, doi: 10.15381/anales.v74i3.2631.