| FFS | Flexible Fiberoptic Sigmoidoscopy |
|---|---|
| FB | fasting blood [sugar]; feedback; fiberoptic bronchoscopy; fingerbreadth; foreign body; Fusobacterium... |
| FFB | flexible fiberoptic bronchoscopy |
| FO | fiberoptic; fish oil; foot arthrosis; foramen ovale; forced oscillation; fronto-occipital |
| FOB | fecal occult blood; feet out of bed; fiberoptic bronchoscopy; foot of bed; functional observational ... |