IRB#____ TITLE: YOUTH INFORMATION SHEET You are invited to be in this research study. Being in this research study is voluntary – you don’t have to be in this research study to get treated. If you decide not to be in the study your doctor will still take care of you. The goal of this study is to see whether the type of match you have with the donor effects how well the transplant works. Specifically, the research doctor is interested in seeing whether bone marrow matched for a chemical called KIR effects whether you are more likely or less likely to be cured, or more likely or less likely to have side effects. About 1 tablespoon of blood will be drawn from you (by a needle, or through your central line) to test for KIR on your blood cells and donor blood cells before the transplant. Your nurse of doctor will draw four more samples of blood to test for KIR at 1 month, 3 months, 6 months, and one year after the transplant. This extra blood will be drawn when you are having other blood tests done. We will also get some medical information from your records and hospital chart. The main risk of being in this research is from the extra blood tests. If a needle is used, then there is a risk of pain or bruising, or infection. There is also a chance that the information we collect about you could be found out by people outside the study.