Theodosia A. Kalfa, MD, PhD, is a hematologist at Cincinnati Children's, focusing on red blood cell disorders and sickle cell disease. She co-directs the Erythrocyte Diagnostic Laboratory and is involved in research on erythropoiesis and red cell membrane disorders. Dr. Kalfa is passionate about advancing the understanding and treatment of blood disorders, providing expert care to her patients and contributing to innovative research in her field.