| FVR | feline viral rhinotracheitis; forearm vascular resistance |
|---|---|
| GTHR | generalized thyroid hormone resistance |
| HAIR-AN | hyperandrogenism, insulin resistance, and acanthosis nigricans [syndrome] |
| IHR | intrahepatic resistance; intrinsic heart rate |
| IPR | insulin production rate; intraparenchymal resistance; ipratropium |