| PAR | participating provider; passive avoidance reaction; perennial allergic rhinitis; photosynthetically ... |
|---|---|
| PDR | pediatric radiology; peripheral diabetic retinopathy; Physicians' Desk Reference; postdelivery room;... |
| PRTH | pituitary resistance to thyroid hormone |
| PRU | peripheral resistance unit |
| PSR | pain sensitivity range; perspective surface rendering; portal systemic resistance; proliferative sic... |