| RIF | radiological interface; release-inhibiting factor; rifampin; right iliac fossa; rosette-inhibiting f... |
|---|---|
| SBF | serologic-blocking factor; specific blocking factor; splanchnic blood flow |
| SDF | slow death factor; stress distribution factor |
| SGF | sarcoma growth factor; skeletal growth factor |
| SMAF | smooth muscle activating factor; specific macrophage arming factor |