| S1-S5 | first to fifth sacral nerves |
|---|---|
| ASP | abnormal spinal posture; acute symmetric polyarthritis; African swine pox; aged substrate plasma; al... |
| LSV | lateral sacral vein; left subclavian vein; longitudinal sound velocity |
| SAO | small airway obstruction; splanchnic artery occlusion; subvalvular aortic obstruction |
| SBF | serologic-blocking factor; specific blocking factor; splanchnic blood flow |