Abdullahi, S. U., Jibir, B. W., Bello-Manga, H., Gambo, S., Inuwa, H., Tijjani, A. G., Idris, N., Galadanci, A., Hikima, M. S., Galadanci, N., Borodo, A., Tabari, A. M., Haliru, L., Suleiman, A., Ibrahim, J., Greene, B. C., Ghafuri, D. L., Rodeghier, M., Slaughter, J. C., Kirkham, F. J., Neville, K., Kassim, A., Trevathan, E., Jordan, L. C., Aliyu, M. H., & DeBaun, M. R. (2022). hydroxyurea for primary stroke prevention in children with sickle cell anaemia in Nigeria (SPRING): a double-blind, multicentre, randomised, phase 3 trial. Lancet, 9(1), e26–e37. http://access.bl.uk/ark:/81055/vdc_100148166613.0x000009