Assessment of drinking water fortification with iron plus ascorbic acid or ascorbic acid alone in daycare centers as a strategy to control iron-deficiency anemia and iron deficiency: a randomized blind clinical study - Almeida, Carlos A. N. de; Mello, Elza D. de; Ramos, Adriana P. R.; João, Camila A.; João, Carolina R.; Dutra de Oliveira, José Eduardo (Journal of Tropical Pediatrics, 2014)