| IAF | idiopathic alveolar fibrosis |
|---|---|
| ICF(M)A | International Cystic Fibrosis (Mucoviscidosis) Association |
| IRF | idiopathic retroperitoneal fibrosis; impulse response function; interferon regulatory factor; intern... |
| MF | magnetic field; meat free; medium frequency; megafarad; membrane filler; merthiolate-formaldehyde [s... |
| NSF | National Science Foundation; nodular subepidermal fibrosis |