How long does someone live with hairy cell leukemia?

How long does someone live with hairy cell leukemia?
What should I know when first diagnosed with hairy cell leukemia?
Who is the best person to treat my hairy cell leukemia?
What is some of the most promising research being done to treat hairy cell leukemia?
How quickly does hairy cell leukemia progress?
How do I know the stage of my hairy cell leukemia?