Hi @athenalee 😊 Yes, the protocol kidney biopsies are performed on the new kidney. @leahdrose is correct when she shared her concern about having a biopsy since they are not risk free. The intention of the protocol biopsies is to try to discover any signs of rejection at the cellular level before it shows up in reduced kidney function. And then hopefully with an increase in immune suppression they can calm it down. It really is difficult to know if it's worth the risk of the biopsy if the function tests look good. I assume the data shows that it's currently worth it. I didn't know that the liver transplants do not have protocol biopsies. That's interesting. Maybe it's a more difficult procedure or something like that? So, I assume that liver transplants only monitor the liver enzymes for signs of rejection. I wonder if kidney transplants are the only organ with protocol biopsies.