| RI | radiation intensity; radioactive isotope; radioimmunology; recession index; recombinant inbred [stra... |
|---|---|
| NFIC | National Foundation for Ileitis and Colitis |
| RBF | regional blood flow; regional bone mass; renal blood flow |
| RMP | rapidly miscible pool; regional medical program; regional myocardial infarction; resting membrane po... |
| rCBF | regional Cerebral Blood Flow |