| OHS | obesity hypoventilation syndrome; occipital Horn syndrome; occupational health service; ocular histo... |
|---|---|
| OPS | operations; optical position sensor; osteoporosis-pseudolipoma syndrome; outpatient service; outpati... |
| PAS | para aminosalicylate; Parent Attitude Scale; patient administration system; patient appointments and... |
| PASW | personal assistance service worker |
| PCS | palliative care service; Patient Care System; patterns of care study; pelvic congestion syndrome; ph... |