| SPIA | solid-phase immunoabsorption; solid-phase immunoassay |
|---|---|
| HFO-A | high-frequency oscillatory [ventilation]-active [expiratory phase] |
| AF | abnormal frequency; acid-fast; adult female; afebrile; aflatoxin; albumin-free; albumose-free; aldeh... |
| FTC | Federal Trade Commission; follicular thyroid carcinoma; frequency threshold curve; frequency tuning ... |
| HFO | high-frequency oscillator; high-frequency oscillatory [ventilation] |