Macmillan Cancer Support
Cancerbackup: Acute Myeloid Leukemia Information Center
This complete site defines leukemia in general and proceeds to examine the causes, diagnosis, and treatment of acute myeloid leukemia.
Other
Leukemia and Lymphoma Society: Leukemia
This excellent site lists the major types of leukemia and describes causes and risk factors, symptoms and signs, and other key information on this disease.