| FSI | foam stability index; Food Sanitation Institute; functional status index; function status index |
|---|---|
| funct | function, functional |
| FXN | function |
| IRF | idiopathic retroperitoneal fibrosis; impulse response function; interferon regulatory factor; intern... |
| KF | Kenner-fecal medium; kidney function; Klippel-Feil [syndrome] |