| STANDOUT | soft thresholding and depth cueing of unspecified techniques |
|---|---|
| URD | unspecified respiratory disease; upper respiratory disease |
| OS | left eye [Lat. oculus sinister]; occipitosacral; occupational safety; office surgery; Omenn syndrome... |
| PCI | patient classification index; pneumatosis cystoides intestinales; prophylactic cranial irradiation; ... |
| Pro | proline; prophylactic; prothrombin |