An individual with<unk>  is usually asymptomatic, however microcytosis can occur where the red blood cells are abnormally small.
Delta-beta thalassemia
Sickle cell-beta thalassemia
Beta thalassemia
Alpha-thalassemia
Thalassemia
Hereditary spherocytosis
Diamond–Blackfan anemia
Twin anemia-polycythemia sequence