|Study Description:||The goal of this clinical research study is to learn if giving busulfan in a |
dose based on blood levels, along with a fixed (unchanging) dose of
fludarabine, is more effective and causes fewer side effects for AML or
myelodysplastic syndrome patients than the standard method of giving a fixed
busulfan dose based on body size, along with a fixed dose of fludarabine. The
safety of dosing based on blood levels will also be studied.