I have 30 years of experience and specialize in the field of pediatric hematology oncology, with specific knowledge of blood diseases, including leukemia, solid tumors in childhood and long-term effects of treatment. I have published on such topics as malignant diseases in children, health-related quality of life and laboratory medicine. I have testified on leukemia in childhood, bleeding disorders in children and transfusion in Jehovah’s Witnesses.