Appellee Automated Medical Laboratories, Inc., is a Florida corporation that operates, through subsidiaries, eight blood plasma centers in the United States. One of the centers, Tampa Plasma Corporation (TPC), is located in Hillsborough County, Florida. Appellees plasma centers collect blood plasma from donors by employing a procedure called plasmapheresis. Under this procedure, whole blood removed from the donor is separated into plasma and other components, and “at least the red blood cells are returned to the donor,” 21 CFR ? 606.3(e) (1984). Appellee sells the plasma to pharmaceutical manufacturers.