| RANA | rheumatoid arthritis nuclear antigen |
|---|---|
| RAP | recurrent abdominal pain; regression-associated protein; renal artery pressure; resident assessment ... |
| RAS | rapid atrial stimulation; recurrent aphthous stomatitis; reflex activating stimulus; reliability, av... |
| RASS | rheumatoid arthritis and Sjogren syndrome |
| RAT | repeat action tablet; rheumatoid arthritis test |