Low, JW; Arimond, M; Osman, N; Cunguara, B; Zano, F; Tschirley, D; (2007) Food-based approach introducing orange-fleshed sweet potatoes increased vitamin A intake and serum retinol concentrations in young children in rural Mozambique. The Journal of nutrition, 137 (5). pp. 1320-7. ISSN 0022-3166 https://researchonline.lshtm.ac.uk/id/eprint/9725 Full text not available from this repository.