| ETL | echo train length; expiratory threshold load |
|---|---|
| expir | expiration, expiratory, expired |
| FEC | forced expiratory capacity; free erythrocyte coproporphyrin; freestanding emergency center; Friend e... |
| FES | family environment scale; fat embolism syndrome; flame emission spectroscopy; forced expiratory spir... |
| FET | field-effect transistor; forced expiratory time |