| CSA | 1) Cell Surface Antigen 2) Central Sleep Apnea |
|---|---|
| OSA | Obstructive Sleep Apnea |
| HSA | Hazardous Substances Act; Health Services Administration; health systems agency; hereditary siderobl... |
| OSA | obstructive sleep apnea; Office of Services to the Aging; Optical Society of America; ovarian sectio... |
| OSAS | obstructive sleep apnea syndrome |