| PIF | paratoid isoelectric focusing variant protein; peak inspiratory flow; proinsulin-free; prolactin-inh... |
|---|---|
| SPF | skin protection factor; specific-pathogen free; spectrophotofluorometer; S-phase fraction; split pro... |
| BSF | back scatter factor; B-cell stimulatory factor; busulfan |
| MCF | macrophage chemotactic factor; median cleft face; medium corpuscular fragility; microcomplement fixa... |
| TRF | T-cell replacing factor; thyrotropin-releasing factor; tubular rejection fraction |