Listed are trials that are either about to begin accruing, are actively accruing, or have just recently finished accruing. MDS indicates myelodysplastic syndrome; CALGB, Cancer and Leukemia Group B; MRC/UK, Medical Research Council of the United Kingdom; ALLG, Australian Leukaemia Lymphoma Group; and CTEP/NCI, Cancer Therapeutic Evaluation Program of the National Cancer Institute.