| FNS | frontier nursing service; functional neuromuscular stimulation |
|---|---|
| FOB | fecal occult blood; feet out of bed; fiberoptic bronchoscopy; foot of bed; functional observational ... |
| FRFC | functional renal failure of cirrhosis |
| FRP | follicle-stimulating hormone releasing protein; functional refractory period |
| FRV | full-length retroviral [sequence]; functional residual volume |