title: Prevalence of abnormal hemoglobin and thalassemia trait in a group of professional blood donors and hospital staff in Karachi.
mesh_terms: D001782:Blood Donors; D005260:Female; D006453:Hemoglobinopathies / Q000453:epidemiology*; D006801:Humans; D008297:Male; D010154:Pakistan; D010564:Personnel, Hospital; D013789:Thalassemia / Q000453:epidemiology*