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. 28 [cited 2024 Aug. 25];7(8):324-6. Available from: https://mansapublishers.com/index.php/ijcr/article/view/2970