| IHR | intrahepatic resistance; intrinsic heart rate |
|---|---|
| IPR | insulin production rate; intraparenchymal resistance; ipratropium |
| IRI | immunoreactive insulin; insulin resistance index |
| MDR | median duration of response; medical device reporting; minimum daily requirement; multidrug resistan... |
| MHR | major histocompatibility region; malignant hyperthermia resistance; maternal heart rate; maximal hea... |