| PSA | parasternal short axis; pleomorphic salivary gland adenoma; polyethylene sulfonic acid; polysacchari... |
|---|---|
| RADAI | rheumatoid arthritis disease activity index |
| RAF | repetitive atrial firing; rheumatoid arthritis factor |
| RANA | rheumatoid arthritis nuclear antigen |
| RAP | recurrent abdominal pain; regression-associated protein; renal artery pressure; resident assessment ... |