Effect of vitamin A supplementation in women of reproductive age on maternal survival in Ghana (ObaapaVitA): a cluster-randomised, placebo-controlled trial
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C. Hurt | B. Kirkwood | P. Arthur | K. Edmond | L. Hurt | S. Owusu-Agyei | Z. Hill | J. Fenty | S. Danso | G. T. Asbroek | C. Tawiah | O. Campbell | S. Amenga‐Etego | Charles Zandoh