| SMAF | smooth muscle activating factor; specific macrophage arming factor |
|---|---|
| SRF | severe renal failure; skin reactive factor; somatotropin-releasing factor; split renal function; sub... |
| TEF | thermic effect of food; thyrotroph embryonic factor; tracheoesophageal fistula; transcriptional enha... |
| TIF | tumor-inducing factor; tumor-inhibiting factor |
| TRF | T-cell replacing factor; thyrotropin-releasing factor; tubular rejection fraction |