Correlation of HbF, HbA2, and HbS in sickle cell disease and its prevalence in Nigerian patients: A case series of 2 patients. Indian J Case Reports [Internet]. 2021 Aug. 20 [cited 2026 Aug. 17];7(8):324-6. Available from: https://www.mansapublishers.com/ijcr/article/view/2970