Which is the best site to keep up to date about cll leukemia?

Few good ones. No one site is tops but the one to follow are: american cancer society (www. Cancer. Org), asco (www. Cancer. Net), nmdp (www. Marrow. Org), www. Focusoncll. Org. Hope this helps.
And a few more. The leukemia and lymphoma society is outstanding (lls. Org) as is the american society of hematology (hematology. Org); for new studies, most worth considering are listed at www. Clintrials. Gov.