| URD | unspecified respiratory disease; upper respiratory disease |
|---|---|
| ARD | absolute reaction of degeneration; acute radiation disease; acute respiratory disease; adult respira... |
| STANDOUT | soft thresholding and depth cueing of unspecified techniques |
| RC | an electronic circuit containing a resistor and capacitor in series; radiocarpal; reaction center; r... |
| RR | radiation reaction; radiation response; rate ratio; rational recovery [group]; recovery room; relati... |