| QLS | Quality of Life Scale; quasielastic light-scattering spectroscopy |
|---|---|
| RAIS | reflection-absorption infrared spectroscopy |
| RELAY | relayed correlation spectroscopy |
| RFS | relapse-free survival; renal function study; rotating frame spectroscopy |
| RIS | radiology information system; rapid immunofluorescence staining; resonance ionization spectroscopy |