I’ll avoid FCR at all. Dangerous and tricky. Increase the probability of AL occurrence as well as second neoplasm and Richter transformation in the long run. You have to be "fit patient” to receive FCR, IGHV mutated and without tp53 mutation or 17p deletion. Find a responsible doctor with a robust experience in biological drug who can profile exactly the biology of your cell clone and suggest the best way to proceed.
I wish you all the best
Federico