plasmapheresis
Double-filtration plasmapheresis (DFPP) has mainly been performed for rheumatoid        arthritis (RA) and systemic lupus erythematosus (SEL) since 1980.
Double-filtration  @SUBJECT$  (DFPP) has mainly been performed  @PREDICAT$   @OBJECT$  (RA) and systemic lupus erythematosus (SEL) since 1980.