Refrences :-
http://www.cancer.ca/Canada-wide/About%20cancer/Types%20of%20cancer/Treatment%20for%20leukemia.aspx
http://www.medicinenet.com/leukemia/article.htm
http://www.webmd.com/cancer/tc/leukemia-topic-overview
http://www.medicalnewstoday.com/articles/142595.php
http://www.nature.com/leu/index.html