 The hospital staff will make a tiny cut in the skin and insert a biopsy needle into the area and to the surface of the kidney. Subjects will be asked to take a deep breath and hold breath as a thin needle is passed through the skin into the kidney. Inside the needle is a sharp edge that will remove small pieces of the kidney. The biopsy needle will then be withdrawn, and pressure will be applied to the biopsy site to stop the minor bleeding that usually occurs after the biopsy. After the procedure, a bandage will be applied to the biopsy site. 