| NMF | N-methylformamide; National Medical Fellowship; National Migraine Foundation; nonmigrating fraction |
|---|---|
| OEF | oil immersion field; oxygen extraction fraction |
| PPF | pellagra preventive factor; phagocytosis promoting factor; phosphonoformate; plasma protein fraction... |
| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
| rOEF | regional oxygen extraction fraction |