| IRF | idiopathic retroperitoneal fibrosis; impulse response function; interferon regulatory factor; intern... |
|---|---|
| IRS | immunoreactive secretion; infrared spectrophotometry; insulin receptor species; insulin receptor sub... |
| ISH | icteric serum hepatitis; in situ hybridization; internal self helper; International Society of Hemat... |
| ITA | inferior temporal artery; internal thoracic artery; International Tuberculosis Association |
| ITT | insulin tolerance test; internal tibial torsion |