I have a client who is in for a kidney transplant workup, and does coke on an occasion. It s not chronic use, but enough that it causes concern. I am a social worker, and know he is using. He has been on incenter HD for 10 years. His labs are fairly good, but does have an elevated phosphorus, as his diet is not exactly the greatest. I am trying to find a good study to show him what damage it is doing now, and how it would effect his transplant, if/when he would get it