So I have to get all the invasive testing out of the way for my transplant stuff. While really I'm still not sick enough to be listed, my transplant doctor wants this information for my chart for a baseline type of thing. This test however, has me beyond nervous. I have no idea what to expect and not sure how painful it will be. I'm having this done at Cleveland Clinic. For those who have been through this, or have had it done at Cleveland Clinic, can you please give me some insight and tips so I know what to expect.