Omisakin, Olatunde O., et al. “A Study of Haemoglobin Concentration on Outcome of Blood Transfusion in Maxillofacial Surgery Patientsin Zaria, Northwest Nigeria”. The Nigerian Health Journal, vol. 22, no. 3, Oct. 2022, pp. 299-04, doi:10.60787/tnhj.v22i3.601.