| ETD | eustachian tube dysfunction |
|---|---|
| ETF | electron-transferring flavoprotein; eustachian tube function |
| ETP | electron transport particle; entire treatment period; ephedrine, theophylline, phenobarbital; eustac... |
| ETT | endotracheal tube; epinephrine tolerance test; exercise tolerance test; exercise treadmill test; ext... |
| HTB | house tube feeding; human tumor bank |