Awwalu, S., Hassan, A., Kusfa, I. U., Waziri, A. D., Ibrahim, I. N., & Yahaya, G. (2020). Sickle cell avascular necrosis: Prevalence and clinical profiles in a tertiary hospital northwestern Nigeria. Annals of African Medical Research, 3(1). https://doi.org/10.4081/aamr.2020.114