| CTPVO | chronic thrombotic pulmonary vascular obstruction |
|---|---|
| EHO | extrahepatic obstruction |
| FBAO | foreign-body airway obstruction |
| IIP | idiopathic interstitial pneumonia; idiopathic intestinal pseudo-obstruction; increased intracranial ... |
| IO | incisal opening; inferior oblique; inferior olive; internal os; interorbital; intestinal obstruction... |