| CAO | chronic airway obstruction; coronary artery obstruction |
|---|---|
| SAO | small airway obstruction; splanchnic artery occlusion; subvalvular aortic obstruction |
| VUR | Vesico-Urethral(Ureteral) Reflux |
| VU shunt | Ventriculo-Ureteral shunt |
| BOU | branchio-oto-ureteral [syndrome] |