Highlights research papers presented at the 45th Annual Meeting of the American Society of Hematology in San Diego, California on December 6-9, 2003. Production strategy developed by researchers from Freiburg University Medical Center in Germany for individual idiotype vaccines; Results of a phase II study of gemtuzumab ozogamicin for the treatment of patients with acute myeloid leukemia; Murine model developed by researchers at the University of Illinois at Chicago and the University of Chicago for myelodysplastic syndrome.