| POR | patient-oriented research; physician of record; postocclusive oscillatory response; prevalence odds ... |
|---|---|
| PRC | packed red cells; peer review committee; phase response curve; plasma renin concentration; professio... |
| PSVER | pattern shift visual evoked response |
| QR | quality review; quantity is correct [Lat. quantum rectum]; quieting response; quinaldine red |
| Rc | conditioned response; receptor |