| Primary: Compare the response rates of two schedules of decitabine in patients with AML 60 and older than 60 and/or unfit for standard cytotoxic chemotherapy.
Secondary: Compare response durations, survivals and side effects of the two schedules.
Tertiary: To examine the correlation of a number of biological and pharmacodynamics correlates with response to therapy including global and gene-specific methylation, specific somatic gene mutations, micro-RNA, and immune effector function |