| RAS | rapid atrial stimulation; recurrent aphthous stomatitis; reflex activating stimulus; reliability, av... |
|---|---|
| RNS | reference normal serum; repetitive nerve stimulation; ribonuclease |
| SAS | sarcoma amplified sequence; self-rating anxiety scale; short arm splint; Sklar Aphasia Scale; sleep ... |
| SBB | stimulation-bound behavior |
| SCNS | subcutaneous nerve stimulation |