Joy, Edward, Kalimbira, Alexander, Gashu, Dawd, Ferguson, Elaine, Sturgess, Joanna, Dangour, Alan, Banda, Leonard, Chiutsi-Phiri, Gabriella, Bailey, Elizabeth et al (2019) Can selenium deficiency in Malawi be alleviated through consumption of agro-biofortified maize flour? Study protocol for a randomised, double-blind, controlled trial. Trials, 20 (795).