| PTRIA | polystyrene-tube radioimmunoassay |
|---|---|
| SERT | sustained ethanol release tube |
| SIFT | selector ion flow tube |
| STF | serum thymus factor; slow-twitch fiber; special tube feeding; specialized treatment center; stefin; ... |
| TF | free thyroxine; tactile fremitus; tail flick [reflex]; temperature factor; testicular feminization; ... |