| PRS | Personality Rating Scale; Pierre Robin syndrome; plasma renin substrate; proctorectosigmoidoscopy |
|---|---|
| RB | radiation burn; rating board; rebreathing; reticulate body; retinoblastoma; right bronchus; right bu... |
| RDRS | rapid disability rating scale |
| RS | radioscaphoid; random sample; rating schedule; Raynaud syndrome; recipient's serum; rectal sinus; re... |
| R-SIRS | Revised Seriousness of Illness Rating Scale |