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Our Team

Clinical Director

Dr. Jackie Powers is an expert in the management of iron deficiency anemia. She was the principal investigator for the BESTIRON clinical trial, which compared the efficacy of two commonly prescribed oral iron medications for the treatment of iron deficiency anemia — ferrous sulfate and NovaFerrum… read more
Phone: 832-824-7330


Dr. Gladstone Airewele is an Associate Professor in the Department of Pediatrics at Baylor College of Medicine, and is the Director of the Global Hematology Program at Texas Children’s Cancer and Hematology Center, Houston, Texas. He specializes in pediatric sickle cell disease. His clinical… read more
Phone: 832-822-4849
Dr. Jenny Despotovic is director of the Hematology Center. Her clinical interests include: immunohematology, immune cytopenias, neonatal hematology, and platelet disorders. She is the editor of the textbook, “Immune Hematology: Diagnosis and Management of Autoimmune Cytopenias,” which was… read more
Phone: 832-822-4302
Dr. Titilope Fasipe's goals are shaped by her desire to help children facing the hardships of a blood disorder. She is intrigued by the clinical challenges of non-malignant hematologic diseases, where in particular, patients with sickle cell disease continue to have significant co-morbid… read more
Phone: 832-822-4362
Dr. Amanda Grimes is a specialist in pediatric hematology-oncology. Her clinical interests include hematology and global health. She was the Chief Fellow for the Cancer and Hematology Center at Texas Children's Hospital from 2015-2016. Board Certifications American Board of Pediatrics American… read more
Phone: 832-822-4217
Dr. Richard Hurwitz is a Co-Director of the Retinoblastoma Program. Dr. Richard Hurwitz studies the potential use of gene therapy for the treatment of ocular diseases. He has shown that a novel treatment for retinoblastoma using suicide gene therapy is safe and possibly effective in children. To… read more
Phone: 832-824-4259
Susan Kirk has been treating children with blood disorders for over 10 years. She is a member of the immune hematology, general hematology, and hematosis and thrombosis teams. Susan treats children with many conditions including anemias, low blood counts and bleeding and clotting disorders. She is… read more
Phone: 832-822-1320
Heather Soni is a pediatric nurse practitioner for the Hemophilia and Thrombosis Program at Texas Children’s Hematology Center. She specializes in the management of anticoagulation disorders. She is board certified by the Texas Board of Nursing and the Pediatric Nursing Certification Board.
Phone: 832-822-1541
Dr. Venee Tubman is a pediatric hematologist specializing in sickle cell disease. She is deeply committed to providing optimal care for children with sickle cell disease around the globe. Her interests include: clinical outcomes for children with sickle cell disease and understanding infections and… read more
Phone: 832-824-4287

Genetic Counselor

Hannah Helber is a certified genetic counselor for the Hematology Center at Texas Children's Hospital. As a genetic counselor in the Hematology Clinic, she works to identify families at risk for inherited hematologic conditions. She provides education on genetics, as well as discussing options for… read more
Phone: 832-822-4240