Stuart Siegel, MD, is the director of the Children's Center for Cancer and Blood Diseases at Children's Hospital Los Angeles. He is known internationally for his investigations in clinical pediatric cancer trials, particularly in the areas of acute lymphoblastic leukemia, non-Hodgkin's lymphoma, and neuroblastoma, as well as new agent trials and supportive care of pediatric cancer patients. Siegel is the founder and president of Southern California Children's Cancer Services, the predecessor to Ronald McDonald House Charities of Southern California, and is a member of the National Board of Ronald McDonald House Charities. He has published more than 150 scientific articles in peer-reviewed journals and 25 textbook chapters and has presented more than 350 papers at local, national, and international medical meetings.