O. O. . Omisakin, I. J. . Deka, A. P. . Ogunsina, R. A. . Zubairu, and O. S. . Ajike, “A study of haemoglobin concentration on outcome of blood transfusion in maxillofacial surgery patients in Zaria, Northwest Nigeria”, Nig. Health J, vol. 22, no. 3, pp. 299–304, Apr. 2023.