| IG | immature granule; immunoglobulin; insulin and glucose; intragastric; irritable gut |
|---|---|
| IGF | insulin-like growth factor |
| IGFPB | insulin-like growth factor binding protein |
| IGFR | insulin-like growth factor receptor |
| IHT | insulin hypoglycemia test; intravenous histamine test; ipsilateral head turning |