1. Leukemia -- Information from Healthwise
Acute leukemia gets worse very quickly. People with acute leukemia often feel sick right away. ALL is the most common leukemia in children. CLL is the most common leukemia in adults, especially older adults.
http://www.everettclinic.com/kbase/topic/major/tv7433/descrip.htm

2. Leukemia -- Information from Health A to Z
Test your knowledge about leukemia, and learn about the different types of leukemia including symptoms. In the acute leukemias, blasts multiply quickly and overcrowd the bone marrow, squeezing out normal cells, then spill over into the bloodstream.
http://www.healthatoz.com/healthatoz/Atoz/dc/caz/canc/leuk/leuk_gen_ovw.jsp

3. Leukemia -- The Cleveland Clinic
Treatment for acute lymphocytic leukemia and acute myelocytic leukemia focuses on curing the disease. Treatment for chronic lymphocytic leukemia and chronic myelocytic leukemia focuses on slowing the progress of the disease and preventing...
http://www.clevelandclinic.org/health/health-info/docs/0000/0024.asp?index=4365