Ready-to-use food supplement, with or without arginine and citrulline, with daily chloroquine in Tanzanian children with sickle-cell disease: a double-blind, random order crossover... od Cox, SE, Ellins, EA, Marealle, AI, Newton, CR, Soka, D, Sasi, P, Di Tanna, G, Johnson, W, Makani, J, Prentice, AM, Halcox, JP, Kirkham, FJ