| ISN | integrated service network; International Society of Nephrology; International Society of Neurochemi... |
|---|---|
| mIU | milli-international unit; one-thousandth of an international unit |
| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |
| ACR | Amylase-Creatinine Clearance Ratio &... |
| CTR | Cardio-Thoracic Ratio |